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Finding the Fourth Proportional to 718,924.78, 992,119.67 and 396,634.87

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Solution

The fourth proportional to 718,924.78, 992,119.67 and 396,634.87 is: 547,358.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,924.78 : 992,119.67 = 396,634.87 : x
  2. Step 2: Convert to fraction form
    718,924.78/992,119.67 = 396,634.87/x
  3. Step 3: Cross multiply
    718,924.78x = 992,119.67 × 396,634.87
  4. Step 4: Simplify right side
    718,924.78x = 393,509,256,334.89
  5. Step 5: Solve for x
    x = 393,509,256,334.89/718,924.78
  6. Step 6: Final answer
    x = 547,358.04

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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.