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Finding the Fourth Proportional to 391,624.92, 540,441.72 and 238,663.80

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Solution

The fourth proportional to 391,624.92, 540,441.72 and 238,663.80 is: 329,355.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,624.92 : 540,441.72 = 238,663.80 : x
  2. Step 2: Convert to fraction form
    391,624.92/540,441.72 = 238,663.80/x
  3. Step 3: Cross multiply
    391,624.92x = 540,441.72 × 238,663.80
  4. Step 4: Simplify right side
    391,624.92x = 128,983,874,573.74
  5. Step 5: Solve for x
    x = 128,983,874,573.74/391,624.92
  6. Step 6: Final answer
    x = 329,355.64

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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.