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Finding the Fourth Proportional to 718,190.68, 991,090.74 and 395,930.74

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Solution

The fourth proportional to 718,190.68, 991,090.74 and 395,930.74 is: 546,377.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,190.68 : 991,090.74 = 395,930.74 : x
  2. Step 2: Convert to fraction form
    718,190.68/991,090.74 = 395,930.74/x
  3. Step 3: Cross multiply
    718,190.68x = 991,090.74 × 395,930.74
  4. Step 4: Simplify right side
    718,190.68x = 392,403,290,095.35
  5. Step 5: Solve for x
    x = 392,403,290,095.35/718,190.68
  6. Step 6: Final answer
    x = 546,377.59

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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.