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Finding the Fourth Proportional to 878,767.64, 1,318,151.52 and 317,670.92

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Solution

The fourth proportional to 878,767.64, 1,318,151.52 and 317,670.92 is: 476,506.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,767.64 : 1,318,151.52 = 317,670.92 : x
  2. Step 2: Convert to fraction form
    878,767.64/1,318,151.52 = 317,670.92/x
  3. Step 3: Cross multiply
    878,767.64x = 1,318,151.52 × 317,670.92
  4. Step 4: Simplify right side
    878,767.64x = 418,738,406,057.80
  5. Step 5: Solve for x
    x = 418,738,406,057.80/878,767.64
  6. Step 6: Final answer
    x = 476,506.40

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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.