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Finding the Fourth Proportional to 643,065.60, 887,366.60 and 371,221.08

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Solution

The fourth proportional to 643,065.60, 887,366.60 and 371,221.08 is: 512,248.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,065.60 : 887,366.60 = 371,221.08 : x
  2. Step 2: Convert to fraction form
    643,065.60/887,366.60 = 371,221.08/x
  3. Step 3: Cross multiply
    643,065.60x = 887,366.60 × 371,221.08
  4. Step 4: Simplify right side
    643,065.60x = 329,409,187,607.93
  5. Step 5: Solve for x
    x = 329,409,187,607.93/643,065.60
  6. Step 6: Final answer
    x = 512,248.19

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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.