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Finding the Fourth Proportional to 652,248.40, 978,372.60 and 279,000.40

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Solution

The fourth proportional to 652,248.40, 978,372.60 and 279,000.40 is: 418,500.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,248.40 : 978,372.60 = 279,000.40 : x
  2. Step 2: Convert to fraction form
    652,248.40/978,372.60 = 279,000.40/x
  3. Step 3: Cross multiply
    652,248.40x = 978,372.60 × 279,000.40
  4. Step 4: Simplify right side
    652,248.40x = 272,966,346,749.04
  5. Step 5: Solve for x
    x = 272,966,346,749.04/652,248.40
  6. Step 6: Final answer
    x = 418,500.60

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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.