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Finding the Fourth Proportional to 719,170.70, 992,479.35 and 392,501.54

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Solution

The fourth proportional to 719,170.70, 992,479.35 and 392,501.54 is: 541,665.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,170.70 : 992,479.35 = 392,501.54 : x
  2. Step 2: Convert to fraction form
    719,170.70/992,479.35 = 392,501.54/x
  3. Step 3: Cross multiply
    719,170.70x = 992,479.35 × 392,501.54
  4. Step 4: Simplify right side
    719,170.70x = 389,549,668,330.80
  5. Step 5: Solve for x
    x = 389,549,668,330.80/719,170.70
  6. Step 6: Final answer
    x = 541,665.10

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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.