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Finding the Fourth Proportional to 658,863.78, 909,242.10 and 386,937.42

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Solution

The fourth proportional to 658,863.78, 909,242.10 and 386,937.42 is: 533,979.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,863.78 : 909,242.10 = 386,937.42 : x
  2. Step 2: Convert to fraction form
    658,863.78/909,242.10 = 386,937.42/x
  3. Step 3: Cross multiply
    658,863.78x = 909,242.10 × 386,937.42
  4. Step 4: Simplify right side
    658,863.78x = 351,819,792,329.38
  5. Step 5: Solve for x
    x = 351,819,792,329.38/658,863.78
  6. Step 6: Final answer
    x = 533,979.56

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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.