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Finding the Fourth Proportional to 561,781.40, 842,781.45 and 162,435.20

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Solution

The fourth proportional to 561,781.40, 842,781.45 and 162,435.20 is: 243,684.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,781.40 : 842,781.45 = 162,435.20 : x
  2. Step 2: Convert to fraction form
    561,781.40/842,781.45 = 162,435.20/x
  3. Step 3: Cross multiply
    561,781.40x = 842,781.45 × 162,435.20
  4. Step 4: Simplify right side
    561,781.40x = 136,897,373,387.04
  5. Step 5: Solve for x
    x = 136,897,373,387.04/561,781.40
  6. Step 6: Final answer
    x = 243,684.42

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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.