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Finding the Fourth Proportional to 681,378.70, 940,343.90 and 375,454.71

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Solution

The fourth proportional to 681,378.70, 940,343.90 and 375,454.71 is: 518,150.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,378.70 : 940,343.90 = 375,454.71 : x
  2. Step 2: Convert to fraction form
    681,378.70/940,343.90 = 375,454.71/x
  3. Step 3: Cross multiply
    681,378.70x = 940,343.90 × 375,454.71
  4. Step 4: Simplify right side
    681,378.70x = 353,056,547,217.67
  5. Step 5: Solve for x
    x = 353,056,547,217.67/681,378.70
  6. Step 6: Final answer
    x = 518,150.25

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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.