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Finding the Fourth Proportional to 652,069.70, 978,680.55 and 385,496.90

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Solution

The fourth proportional to 652,069.70, 978,680.55 and 385,496.90 is: 578,585.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,069.70 : 978,680.55 = 385,496.90 : x
  2. Step 2: Convert to fraction form
    652,069.70/978,680.55 = 385,496.90/x
  3. Step 3: Cross multiply
    652,069.70x = 978,680.55 × 385,496.90
  4. Step 4: Simplify right side
    652,069.70x = 377,278,318,115.30
  5. Step 5: Solve for x
    x = 377,278,318,115.30/652,069.70
  6. Step 6: Final answer
    x = 578,585.88

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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.