Home / 689,646.39-951,697.08-399,270.20

Finding the Fourth Proportional to 689,646.39, 951,697.08 and 399,270.20

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Solution

The fourth proportional to 689,646.39, 951,697.08 and 399,270.20 is: 550,984.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,646.39 : 951,697.08 = 399,270.20 : x
  2. Step 2: Convert to fraction form
    689,646.39/951,697.08 = 399,270.20/x
  3. Step 3: Cross multiply
    689,646.39x = 951,697.08 × 399,270.20
  4. Step 4: Simplify right side
    689,646.39x = 379,984,278,712.53
  5. Step 5: Solve for x
    x = 379,984,278,712.53/689,646.39
  6. Step 6: Final answer
    x = 550,984.22

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.