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Finding the Fourth Proportional to 261,977.60, 392,964.64 and 74,989.60

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Solution

The fourth proportional to 261,977.60, 392,964.64 and 74,989.60 is: 112,483.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,977.60 : 392,964.64 = 74,989.60 : x
  2. Step 2: Convert to fraction form
    261,977.60/392,964.64 = 74,989.60/x
  3. Step 3: Cross multiply
    261,977.60x = 392,964.64 × 74,989.60
  4. Step 4: Simplify right side
    261,977.60x = 29,468,261,167.74
  5. Step 5: Solve for x
    x = 29,468,261,167.74/261,977.60
  6. Step 6: Final answer
    x = 112,483.90

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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.