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Finding the Fourth Proportional to 718,142.04, 991,042.68 and 395,863.65

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Solution

The fourth proportional to 718,142.04, 991,042.68 and 395,863.65 is: 546,295.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,142.04 : 991,042.68 = 395,863.65 : x
  2. Step 2: Convert to fraction form
    718,142.04/991,042.68 = 395,863.65/x
  3. Step 3: Cross multiply
    718,142.04x = 991,042.68 × 395,863.65
  4. Step 4: Simplify right side
    718,142.04x = 392,317,772,610.58
  5. Step 5: Solve for x
    x = 392,317,772,610.58/718,142.04
  6. Step 6: Final answer
    x = 546,295.51

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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.