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Finding the Fourth Proportional to 261,578.52, 392,540.12 and 143,332.88

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Solution

The fourth proportional to 261,578.52, 392,540.12 and 143,332.88 is: 215,093.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,578.52 : 392,540.12 = 143,332.88 : x
  2. Step 2: Convert to fraction form
    261,578.52/392,540.12 = 143,332.88/x
  3. Step 3: Cross multiply
    261,578.52x = 392,540.12 × 143,332.88
  4. Step 4: Simplify right side
    261,578.52x = 56,263,905,915.15
  5. Step 5: Solve for x
    x = 56,263,905,915.15/261,578.52
  6. Step 6: Final answer
    x = 215,093.75

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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.