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Finding the Fourth Proportional to 391,348.77, 541,148.42 and 310,636.17

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Solution

The fourth proportional to 391,348.77, 541,148.42 and 310,636.17 is: 429,540.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,348.77 : 541,148.42 = 310,636.17 : x
  2. Step 2: Convert to fraction form
    391,348.77/541,148.42 = 310,636.17/x
  3. Step 3: Cross multiply
    391,348.77x = 541,148.42 × 310,636.17
  4. Step 4: Simplify right side
    391,348.77x = 168,100,271,037.17
  5. Step 5: Solve for x
    x = 168,100,271,037.17/391,348.77
  6. Step 6: Final answer
    x = 429,540.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.