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Finding the Fourth Proportional to 718,200.72, 991,104.58 and 395,940.80

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Solution

The fourth proportional to 718,200.72, 991,104.58 and 395,940.80 is: 546,391.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,200.72 : 991,104.58 = 395,940.80 : x
  2. Step 2: Convert to fraction form
    718,200.72/991,104.58 = 395,940.80/x
  3. Step 3: Cross multiply
    718,200.72x = 991,104.58 × 395,940.80
  4. Step 4: Simplify right side
    718,200.72x = 392,418,740,288.86
  5. Step 5: Solve for x
    x = 392,418,740,288.86/718,200.72
  6. Step 6: Final answer
    x = 546,391.46

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Double scale
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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.