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Finding the Fourth Proportional to 525,079.80, 787,619.70 and 346,620.60

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Solution

The fourth proportional to 525,079.80, 787,619.70 and 346,620.60 is: 519,930.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,079.80 : 787,619.70 = 346,620.60 : x
  2. Step 2: Convert to fraction form
    525,079.80/787,619.70 = 346,620.60/x
  3. Step 3: Cross multiply
    525,079.80x = 787,619.70 × 346,620.60
  4. Step 4: Simplify right side
    525,079.80x = 273,005,212,985.82
  5. Step 5: Solve for x
    x = 273,005,212,985.82/525,079.80
  6. Step 6: Final answer
    x = 519,930.90

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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.