Home / 828,003.70-1,242,005.55-509,139.10

Finding the Fourth Proportional to 828,003.70, 1,242,005.55 and 509,139.10

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Solution

The fourth proportional to 828,003.70, 1,242,005.55 and 509,139.10 is: 763,708.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,003.70 : 1,242,005.55 = 509,139.10 : x
  2. Step 2: Convert to fraction form
    828,003.70/1,242,005.55 = 509,139.10/x
  3. Step 3: Cross multiply
    828,003.70x = 1,242,005.55 × 509,139.10
  4. Step 4: Simplify right side
    828,003.70x = 632,353,587,922.01
  5. Step 5: Solve for x
    x = 632,353,587,922.01/828,003.70
  6. Step 6: Final answer
    x = 763,708.65

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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.