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Finding the Fourth Proportional to 509,615.10, 764,422.65 and 439,631.10

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Solution

The fourth proportional to 509,615.10, 764,422.65 and 439,631.10 is: 659,446.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,615.10 : 764,422.65 = 439,631.10 : x
  2. Step 2: Convert to fraction form
    509,615.10/764,422.65 = 439,631.10/x
  3. Step 3: Cross multiply
    509,615.10x = 764,422.65 × 439,631.10
  4. Step 4: Simplify right side
    509,615.10x = 336,063,970,484.42
  5. Step 5: Solve for x
    x = 336,063,970,484.42/509,615.10
  6. Step 6: Final answer
    x = 659,446.65

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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.