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Finding the Fourth Proportional to 714,217.40, 985,571.80 and 391,948.16

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Solution

The fourth proportional to 714,217.40, 985,571.80 and 391,948.16 is: 540,862.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,217.40 : 985,571.80 = 391,948.16 : x
  2. Step 2: Convert to fraction form
    714,217.40/985,571.80 = 391,948.16/x
  3. Step 3: Cross multiply
    714,217.40x = 985,571.80 × 391,948.16
  4. Step 4: Simplify right side
    714,217.40x = 386,293,053,557.89
  5. Step 5: Solve for x
    x = 386,293,053,557.89/714,217.40
  6. Step 6: Final answer
    x = 540,862.00

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.