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Finding the Fourth Proportional to 278,897.30, 418,373.58 and 89,310.08

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Solution

The fourth proportional to 278,897.30, 418,373.58 and 89,310.08 is: 133,973.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,897.30 : 418,373.58 = 89,310.08 : x
  2. Step 2: Convert to fraction form
    278,897.30/418,373.58 = 89,310.08/x
  3. Step 3: Cross multiply
    278,897.30x = 418,373.58 × 89,310.08
  4. Step 4: Simplify right side
    278,897.30x = 37,364,977,899.69
  5. Step 5: Solve for x
    x = 37,364,977,899.69/278,897.30
  6. Step 6: Final answer
    x = 133,973.97

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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.