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Finding the Fourth Proportional to 257,908.60, 386,862.90 and 147,316.60

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Solution

The fourth proportional to 257,908.60, 386,862.90 and 147,316.60 is: 220,974.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,908.60 : 386,862.90 = 147,316.60 : x
  2. Step 2: Convert to fraction form
    257,908.60/386,862.90 = 147,316.60/x
  3. Step 3: Cross multiply
    257,908.60x = 386,862.90 × 147,316.60
  4. Step 4: Simplify right side
    257,908.60x = 56,991,327,094.14
  5. Step 5: Solve for x
    x = 56,991,327,094.14/257,908.60
  6. Step 6: Final answer
    x = 220,974.90

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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.