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Finding the Fourth Proportional to 714,167.70, 985,518.39 and 391,869.78

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Solution

The fourth proportional to 714,167.70, 985,518.39 and 391,869.78 is: 540,762.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,167.70 : 985,518.39 = 391,869.78 : x
  2. Step 2: Convert to fraction form
    714,167.70/985,518.39 = 391,869.78/x
  3. Step 3: Cross multiply
    714,167.70x = 985,518.39 × 391,869.78
  4. Step 4: Simplify right side
    714,167.70x = 386,194,874,675.25
  5. Step 5: Solve for x
    x = 386,194,874,675.25/714,167.70
  6. Step 6: Final answer
    x = 540,762.17

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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.