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Finding the Fourth Proportional to 719,200.62, 992,510.69 and 396,903.80

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Solution

The fourth proportional to 719,200.62, 992,510.69 and 396,903.80 is: 547,734.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,200.62 : 992,510.69 = 396,903.80 : x
  2. Step 2: Convert to fraction form
    719,200.62/992,510.69 = 396,903.80/x
  3. Step 3: Cross multiply
    719,200.62x = 992,510.69 × 396,903.80
  4. Step 4: Simplify right side
    719,200.62x = 393,931,264,898.38
  5. Step 5: Solve for x
    x = 393,931,264,898.38/719,200.62
  6. Step 6: Final answer
    x = 547,734.88

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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.