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Finding the Fourth Proportional to 661,985.62, 913,560.60 and 375,517.78

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Solution

The fourth proportional to 661,985.62, 913,560.60 and 375,517.78 is: 518,226.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,985.62 : 913,560.60 = 375,517.78 : x
  2. Step 2: Convert to fraction form
    661,985.62/913,560.60 = 375,517.78/x
  3. Step 3: Cross multiply
    661,985.62x = 913,560.60 × 375,517.78
  4. Step 4: Simplify right side
    661,985.62x = 343,058,248,407.47
  5. Step 5: Solve for x
    x = 343,058,248,407.47/661,985.62
  6. Step 6: Final answer
    x = 518,226.13

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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.