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Finding the Fourth Proportional to 257,059.47, 385,605.54 and 79,551.57

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Solution

The fourth proportional to 257,059.47, 385,605.54 and 79,551.57 is: 119,332.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,059.47 : 385,605.54 = 79,551.57 : x
  2. Step 2: Convert to fraction form
    257,059.47/385,605.54 = 79,551.57/x
  3. Step 3: Cross multiply
    257,059.47x = 385,605.54 × 79,551.57
  4. Step 4: Simplify right side
    257,059.47x = 30,675,526,107.70
  5. Step 5: Solve for x
    x = 30,675,526,107.70/257,059.47
  6. Step 6: Final answer
    x = 119,332.41

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1.5x scale

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.