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Finding the Fourth Proportional to 988,901.60, 1,483,352.40 and 278,920.40

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Solution

The fourth proportional to 988,901.60, 1,483,352.40 and 278,920.40 is: 418,380.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    988,901.60 : 1,483,352.40 = 278,920.40 : x
  2. Step 2: Convert to fraction form
    988,901.60/1,483,352.40 = 278,920.40/x
  3. Step 3: Cross multiply
    988,901.60x = 1,483,352.40 × 278,920.40
  4. Step 4: Simplify right side
    988,901.60x = 413,737,244,748.96
  5. Step 5: Solve for x
    x = 413,737,244,748.96/988,901.60
  6. Step 6: Final answer
    x = 418,380.60

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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.