Home / 509,764.20-764,646.30-438,905.40

Finding the Fourth Proportional to 509,764.20, 764,646.30 and 438,905.40

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Solution

The fourth proportional to 509,764.20, 764,646.30 and 438,905.40 is: 658,358.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,764.20 : 764,646.30 = 438,905.40 : x
  2. Step 2: Convert to fraction form
    509,764.20/764,646.30 = 438,905.40/x
  3. Step 3: Cross multiply
    509,764.20x = 764,646.30 × 438,905.40
  4. Step 4: Simplify right side
    509,764.20x = 335,607,390,160.02
  5. Step 5: Solve for x
    x = 335,607,390,160.02/509,764.20
  6. Step 6: Final answer
    x = 658,358.10

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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.