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Finding the Fourth Proportional to 247,066.67, 340,988.54 and 156,431.05

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Solution

The fourth proportional to 247,066.67, 340,988.54 and 156,431.05 is: 215,897.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,066.67 : 340,988.54 = 156,431.05 : x
  2. Step 2: Convert to fraction form
    247,066.67/340,988.54 = 156,431.05/x
  3. Step 3: Cross multiply
    247,066.67x = 340,988.54 × 156,431.05
  4. Step 4: Simplify right side
    247,066.67x = 53,341,193,715.54
  5. Step 5: Solve for x
    x = 53,341,193,715.54/247,066.67
  6. Step 6: Final answer
    x = 215,897.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.