Home / 742,421.91-1,024,542.89-402,890.16

Finding the Fourth Proportional to 742,421.91, 1,024,542.89 and 402,890.16

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Solution

The fourth proportional to 742,421.91, 1,024,542.89 and 402,890.16 is: 555,988.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,421.91 : 1,024,542.89 = 402,890.16 : x
  2. Step 2: Convert to fraction form
    742,421.91/1,024,542.89 = 402,890.16/x
  3. Step 3: Cross multiply
    742,421.91x = 1,024,542.89 × 402,890.16
  4. Step 4: Simplify right side
    742,421.91x = 412,778,248,878.96
  5. Step 5: Solve for x
    x = 412,778,248,878.96/742,421.91
  6. Step 6: Final answer
    x = 555,988.78

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Double scale
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Similar ratio
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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.