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Finding the Fourth Proportional to 718,113.77, 990,951.95 and 395,806.13

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Solution

The fourth proportional to 718,113.77, 990,951.95 and 395,806.13 is: 546,187.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,113.77 : 990,951.95 = 395,806.13 : x
  2. Step 2: Convert to fraction form
    718,113.77/990,951.95 = 395,806.13/x
  3. Step 3: Cross multiply
    718,113.77x = 990,951.95 × 395,806.13
  4. Step 4: Simplify right side
    718,113.77x = 392,224,854,366.42
  5. Step 5: Solve for x
    x = 392,224,854,366.42/718,113.77
  6. Step 6: Final answer
    x = 546,187.62

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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.