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Finding the Fourth Proportional to 718,551.69, 991,581.80 and 396,255.93

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Solution

The fourth proportional to 718,551.69, 991,581.80 and 396,255.93 is: 546,822.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,551.69 : 991,581.80 = 396,255.93 : x
  2. Step 2: Convert to fraction form
    718,551.69/991,581.80 = 396,255.93/x
  3. Step 3: Cross multiply
    718,551.69x = 991,581.80 × 396,255.93
  4. Step 4: Simplify right side
    718,551.69x = 392,920,166,348.79
  5. Step 5: Solve for x
    x = 392,920,166,348.79/718,551.69
  6. Step 6: Final answer
    x = 546,822.41

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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.