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Finding the Fourth Proportional to 521,106.30, 719,139.60 and 291,661.65

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Solution

The fourth proportional to 521,106.30, 719,139.60 and 291,661.65 is: 402,500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,106.30 : 719,139.60 = 291,661.65 : x
  2. Step 2: Convert to fraction form
    521,106.30/719,139.60 = 291,661.65/x
  3. Step 3: Cross multiply
    521,106.30x = 719,139.60 × 291,661.65
  4. Step 4: Simplify right side
    521,106.30x = 209,745,442,316.34
  5. Step 5: Solve for x
    x = 209,745,442,316.34/521,106.30
  6. Step 6: Final answer
    x = 402,500.30

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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.