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Finding the Fourth Proportional to 474,815.70, 712,223.55 and 142,391.70

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Solution

The fourth proportional to 474,815.70, 712,223.55 and 142,391.70 is: 213,587.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    474,815.70 : 712,223.55 = 142,391.70 : x
  2. Step 2: Convert to fraction form
    474,815.70/712,223.55 = 142,391.70/x
  3. Step 3: Cross multiply
    474,815.70x = 712,223.55 × 142,391.70
  4. Step 4: Simplify right side
    474,815.70x = 101,414,722,064.54
  5. Step 5: Solve for x
    x = 101,414,722,064.54/474,815.70
  6. Step 6: Final answer
    x = 213,587.55

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Similar ratio
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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.