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Finding the Fourth Proportional to 647,614.10, 971,421.15 and 367,678.10

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Solution

The fourth proportional to 647,614.10, 971,421.15 and 367,678.10 is: 551,517.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,614.10 : 971,421.15 = 367,678.10 : x
  2. Step 2: Convert to fraction form
    647,614.10/971,421.15 = 367,678.10/x
  3. Step 3: Cross multiply
    647,614.10x = 971,421.15 × 367,678.10
  4. Step 4: Simplify right side
    647,614.10x = 357,170,282,731.82
  5. Step 5: Solve for x
    x = 357,170,282,731.82/647,614.10
  6. Step 6: Final answer
    x = 551,517.15

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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.