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Finding the Fourth Proportional to 714,218.77, 985,642.32 and 391,950.15

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Solution

The fourth proportional to 714,218.77, 985,642.32 and 391,950.15 is: 540,902.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,218.77 : 985,642.32 = 391,950.15 : x
  2. Step 2: Convert to fraction form
    714,218.77/985,642.32 = 391,950.15/x
  3. Step 3: Cross multiply
    714,218.77x = 985,642.32 × 391,950.15
  4. Step 4: Simplify right side
    714,218.77x = 386,322,655,170.35
  5. Step 5: Solve for x
    x = 386,322,655,170.35/714,218.77
  6. Step 6: Final answer
    x = 540,902.41

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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.