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Finding the Fourth Proportional to 647,550.20, 971,325.30 and 423,601.40

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Solution

The fourth proportional to 647,550.20, 971,325.30 and 423,601.40 is: 635,402.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,550.20 : 971,325.30 = 423,601.40 : x
  2. Step 2: Convert to fraction form
    647,550.20/971,325.30 = 423,601.40/x
  3. Step 3: Cross multiply
    647,550.20x = 971,325.30 × 423,601.40
  4. Step 4: Simplify right side
    647,550.20x = 411,454,756,935.42
  5. Step 5: Solve for x
    x = 411,454,756,935.42/647,550.20
  6. Step 6: Final answer
    x = 635,402.10

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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.