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Finding the Fourth Proportional to 391,539, 540,277.98 and 230,358.60

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Solution

The fourth proportional to 391,539, 540,277.98 and 230,358.60 is: 317,867.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,539 : 540,277.98 = 230,358.60 : x
  2. Step 2: Convert to fraction form
    391,539/540,277.98 = 230,358.60/x
  3. Step 3: Cross multiply
    391,539x = 540,277.98 × 230,358.60
  4. Step 4: Simplify right side
    391,539x = 124,457,679,083.63
  5. Step 5: Solve for x
    x = 124,457,679,083.63/391,539
  6. Step 6: Final answer
    x = 317,867.90

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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.