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Finding the Fourth Proportional to 718,046.80, 990,909.26 and 395,756.88

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Solution

The fourth proportional to 718,046.80, 990,909.26 and 395,756.88 is: 546,147.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,046.80 : 990,909.26 = 395,756.88 : x
  2. Step 2: Convert to fraction form
    718,046.80/990,909.26 = 395,756.88/x
  3. Step 3: Cross multiply
    718,046.80x = 990,909.26 × 395,756.88
  4. Step 4: Simplify right side
    718,046.80x = 392,159,157,100.71
  5. Step 5: Solve for x
    x = 392,159,157,100.71/718,046.80
  6. Step 6: Final answer
    x = 546,147.07

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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.