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Finding the Fourth Proportional to 393,907.32, 542,833.65 and 286,306.92

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Solution

The fourth proportional to 393,907.32, 542,833.65 and 286,306.92 is: 394,552.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,907.32 : 542,833.65 = 286,306.92 : x
  2. Step 2: Convert to fraction form
    393,907.32/542,833.65 = 286,306.92/x
  3. Step 3: Cross multiply
    393,907.32x = 542,833.65 × 286,306.92
  4. Step 4: Simplify right side
    393,907.32x = 155,417,030,403.86
  5. Step 5: Solve for x
    x = 155,417,030,403.86/393,907.32
  6. Step 6: Final answer
    x = 394,552.28

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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.