Home / 742,687.17-1,024,932.65-420,390.39

Finding the Fourth Proportional to 742,687.17, 1,024,932.65 and 420,390.39

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Solution

The fourth proportional to 742,687.17, 1,024,932.65 and 420,390.39 is: 580,152.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,687.17 : 1,024,932.65 = 420,390.39 : x
  2. Step 2: Convert to fraction form
    742,687.17/1,024,932.65 = 420,390.39/x
  3. Step 3: Cross multiply
    742,687.17x = 1,024,932.65 × 420,390.39
  4. Step 4: Simplify right side
    742,687.17x = 430,871,836,457.23
  5. Step 5: Solve for x
    x = 430,871,836,457.23/742,687.17
  6. Step 6: Final answer
    x = 580,152.52

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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.