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Finding the Fourth Proportional to 521,219.32, 719,221.98 and 291,789.16

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Solution

The fourth proportional to 521,219.32, 719,221.98 and 291,789.16 is: 402,635.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,219.32 : 719,221.98 = 291,789.16 : x
  2. Step 2: Convert to fraction form
    521,219.32/719,221.98 = 291,789.16/x
  3. Step 3: Cross multiply
    521,219.32x = 719,221.98 × 291,789.16
  4. Step 4: Simplify right side
    521,219.32x = 209,861,177,397.74
  5. Step 5: Solve for x
    x = 209,861,177,397.74/521,219.32
  6. Step 6: Final answer
    x = 402,635.07

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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.