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Finding the Fourth Proportional to 391,423.90, 540,155.83 and 230,289.33

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Solution

The fourth proportional to 391,423.90, 540,155.83 and 230,289.33 is: 317,793.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,423.90 : 540,155.83 = 230,289.33 : x
  2. Step 2: Convert to fraction form
    391,423.90/540,155.83 = 230,289.33/x
  3. Step 3: Cross multiply
    391,423.90x = 540,155.83 × 230,289.33
  4. Step 4: Simplify right side
    391,423.90x = 124,392,124,186.29
  5. Step 5: Solve for x
    x = 124,392,124,186.29/391,423.90
  6. Step 6: Final answer
    x = 317,793.89

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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.