Home / 742,685.28-1,024,930.11-420,388.48

Finding the Fourth Proportional to 742,685.28, 1,024,930.11 and 420,388.48

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Solution

The fourth proportional to 742,685.28, 1,024,930.11 and 420,388.48 is: 580,149.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,685.28 : 1,024,930.11 = 420,388.48 : x
  2. Step 2: Convert to fraction form
    742,685.28/1,024,930.11 = 420,388.48/x
  3. Step 3: Cross multiply
    742,685.28x = 1,024,930.11 × 420,388.48
  4. Step 4: Simplify right side
    742,685.28x = 430,868,811,049.13
  5. Step 5: Solve for x
    x = 430,868,811,049.13/742,685.28
  6. Step 6: Final answer
    x = 580,149.93

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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.