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Finding the Fourth Proportional to 619,405.20, 929,107.80 and 479,437.20

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Solution

The fourth proportional to 619,405.20, 929,107.80 and 479,437.20 is: 719,155.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,405.20 : 929,107.80 = 479,437.20 : x
  2. Step 2: Convert to fraction form
    619,405.20/929,107.80 = 479,437.20/x
  3. Step 3: Cross multiply
    619,405.20x = 929,107.80 × 479,437.20
  4. Step 4: Simplify right side
    619,405.20x = 445,448,842,130.16
  5. Step 5: Solve for x
    x = 445,448,842,130.16/619,405.20
  6. Step 6: Final answer
    x = 719,155.80

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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.