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Finding the Fourth Proportional to 261,665.20, 392,935.20 and 173,310.40

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Solution

The fourth proportional to 261,665.20, 392,935.20 and 173,310.40 is: 260,255.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,665.20 : 392,935.20 = 173,310.40 : x
  2. Step 2: Convert to fraction form
    261,665.20/392,935.20 = 173,310.40/x
  3. Step 3: Cross multiply
    261,665.20x = 392,935.20 × 173,310.40
  4. Step 4: Simplify right side
    261,665.20x = 68,099,756,686.08
  5. Step 5: Solve for x
    x = 68,099,756,686.08/261,665.20
  6. Step 6: Final answer
    x = 260,255.31

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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.