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Finding the Fourth Proportional to 487,406.30, 731,109.45 and 345,688.70

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Solution

The fourth proportional to 487,406.30, 731,109.45 and 345,688.70 is: 518,533.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,406.30 : 731,109.45 = 345,688.70 : x
  2. Step 2: Convert to fraction form
    487,406.30/731,109.45 = 345,688.70/x
  3. Step 3: Cross multiply
    487,406.30x = 731,109.45 × 345,688.70
  4. Step 4: Simplify right side
    487,406.30x = 252,736,275,328.22
  5. Step 5: Solve for x
    x = 252,736,275,328.22/487,406.30
  6. Step 6: Final answer
    x = 518,533.05

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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.