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Finding the Fourth Proportional to 561,103.40, 842,432.70 and 442,908.20

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Solution

The fourth proportional to 561,103.40, 842,432.70 and 442,908.20 is: 664,976.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,103.40 : 842,432.70 = 442,908.20 : x
  2. Step 2: Convert to fraction form
    561,103.40/842,432.70 = 442,908.20/x
  3. Step 3: Cross multiply
    561,103.40x = 842,432.70 × 442,908.20
  4. Step 4: Simplify right side
    561,103.40x = 373,120,350,778.14
  5. Step 5: Solve for x
    x = 373,120,350,778.14/561,103.40
  6. Step 6: Final answer
    x = 664,976.10

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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.