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Finding the Fourth Proportional to 472,654.20, 708,981.30 and 140,230.20

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Solution

The fourth proportional to 472,654.20, 708,981.30 and 140,230.20 is: 210,345.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,654.20 : 708,981.30 = 140,230.20 : x
  2. Step 2: Convert to fraction form
    472,654.20/708,981.30 = 140,230.20/x
  3. Step 3: Cross multiply
    472,654.20x = 708,981.30 × 140,230.20
  4. Step 4: Simplify right side
    472,654.20x = 99,420,589,495.26
  5. Step 5: Solve for x
    x = 99,420,589,495.26/472,654.20
  6. Step 6: Final answer
    x = 210,345.30

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.