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Finding the Fourth Proportional to 391,433.90, 540,169.62 and 230,299.34

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Solution

The fourth proportional to 391,433.90, 540,169.62 and 230,299.34 is: 317,807.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,433.90 : 540,169.62 = 230,299.34 : x
  2. Step 2: Convert to fraction form
    391,433.90/540,169.62 = 230,299.34/x
  3. Step 3: Cross multiply
    391,433.90x = 540,169.62 × 230,299.34
  4. Step 4: Simplify right side
    391,433.90x = 124,400,706,974.05
  5. Step 5: Solve for x
    x = 124,400,706,974.05/391,433.90
  6. Step 6: Final answer
    x = 317,807.70

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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.