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Finding the Fourth Proportional to 876,003.80, 1,314,005.70 and 378,339.80

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Solution

The fourth proportional to 876,003.80, 1,314,005.70 and 378,339.80 is: 567,509.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,003.80 : 1,314,005.70 = 378,339.80 : x
  2. Step 2: Convert to fraction form
    876,003.80/1,314,005.70 = 378,339.80/x
  3. Step 3: Cross multiply
    876,003.80x = 1,314,005.70 × 378,339.80
  4. Step 4: Simplify right side
    876,003.80x = 497,140,653,736.86
  5. Step 5: Solve for x
    x = 497,140,653,736.86/876,003.80
  6. Step 6: Final answer
    x = 567,509.70

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.