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Finding the Fourth Proportional to 714,232.80, 985,653.34 and 391,972.90

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Solution

The fourth proportional to 714,232.80, 985,653.34 and 391,972.90 is: 540,929.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,232.80 : 985,653.34 = 391,972.90 : x
  2. Step 2: Convert to fraction form
    714,232.80/985,653.34 = 391,972.90/x
  3. Step 3: Cross multiply
    714,232.80x = 985,653.34 × 391,972.90
  4. Step 4: Simplify right side
    714,232.80x = 386,349,398,074.49
  5. Step 5: Solve for x
    x = 386,349,398,074.49/714,232.80
  6. Step 6: Final answer
    x = 540,929.23

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Double scale
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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.