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Finding the Fourth Proportional to 261,643.20, 392,925.60 and 253,348.80

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Solution

The fourth proportional to 261,643.20, 392,925.60 and 253,348.80 is: 380,469.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,643.20 : 392,925.60 = 253,348.80 : x
  2. Step 2: Convert to fraction form
    261,643.20/392,925.60 = 253,348.80/x
  3. Step 3: Cross multiply
    261,643.20x = 392,925.60 × 253,348.80
  4. Step 4: Simplify right side
    261,643.20x = 99,547,229,249.28
  5. Step 5: Solve for x
    x = 99,547,229,249.28/261,643.20
  6. Step 6: Final answer
    x = 380,469.39

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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.