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Finding the Fourth Proportional to 647,712.60, 971,568.90 and 367,776.60

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Solution

The fourth proportional to 647,712.60, 971,568.90 and 367,776.60 is: 551,664.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,712.60 : 971,568.90 = 367,776.60 : x
  2. Step 2: Convert to fraction form
    647,712.60/971,568.90 = 367,776.60/x
  3. Step 3: Cross multiply
    647,712.60x = 971,568.90 × 367,776.60
  4. Step 4: Simplify right side
    647,712.60x = 357,320,306,707.74
  5. Step 5: Solve for x
    x = 357,320,306,707.74/647,712.60
  6. Step 6: Final answer
    x = 551,664.90

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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.