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Finding the Fourth Proportional to 718,267.27, 991,215.62 and 395,988.93

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Solution

The fourth proportional to 718,267.27, 991,215.62 and 395,988.93 is: 546,468.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,267.27 : 991,215.62 = 395,988.93 : x
  2. Step 2: Convert to fraction form
    718,267.27/991,215.62 = 395,988.93/x
  3. Step 3: Cross multiply
    718,267.27x = 991,215.62 × 395,988.93
  4. Step 4: Simplify right side
    718,267.27x = 392,510,412,763.09
  5. Step 5: Solve for x
    x = 392,510,412,763.09/718,267.27
  6. Step 6: Final answer
    x = 546,468.47

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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.