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Finding the Fourth Proportional to 257,097.20, 385,645.80 and 257,097.20

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Solution

The fourth proportional to 257,097.20, 385,645.80 and 257,097.20 is: 385,645.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,097.20 : 385,645.80 = 257,097.20 : x
  2. Step 2: Convert to fraction form
    257,097.20/385,645.80 = 257,097.20/x
  3. Step 3: Cross multiply
    257,097.20x = 385,645.80 × 257,097.20
  4. Step 4: Simplify right side
    257,097.20x = 99,148,455,371.76
  5. Step 5: Solve for x
    x = 99,148,455,371.76/257,097.20
  6. Step 6: Final answer
    x = 385,645.80

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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.