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Finding the Fourth Proportional to 718,249.14, 991,190.52 and 395,970.66

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Solution

The fourth proportional to 718,249.14, 991,190.52 and 395,970.66 is: 546,443.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,249.14 : 991,190.52 = 395,970.66 : x
  2. Step 2: Convert to fraction form
    718,249.14/991,190.52 = 395,970.66/x
  3. Step 3: Cross multiply
    718,249.14x = 991,190.52 × 395,970.66
  4. Step 4: Simplify right side
    718,249.14x = 392,482,364,390.14
  5. Step 5: Solve for x
    x = 392,482,364,390.14/718,249.14
  6. Step 6: Final answer
    x = 546,443.21

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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.