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Finding the Fourth Proportional to 487,689.05, 731,459.66 and 132,730.73

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Solution

The fourth proportional to 487,689.05, 731,459.66 and 132,730.73 is: 199,075.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,689.05 : 731,459.66 = 132,730.73 : x
  2. Step 2: Convert to fraction form
    487,689.05/731,459.66 = 132,730.73/x
  3. Step 3: Cross multiply
    487,689.05x = 731,459.66 × 132,730.73
  4. Step 4: Simplify right side
    487,689.05x = 97,087,170,316.40
  5. Step 5: Solve for x
    x = 97,087,170,316.40/487,689.05
  6. Step 6: Final answer
    x = 199,075.97

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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.