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Finding the Fourth Proportional to 283,639.53, 391,422.54 and 156,315.13

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Solution

The fourth proportional to 283,639.53, 391,422.54 and 156,315.13 is: 215,714.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,639.53 : 391,422.54 = 156,315.13 : x
  2. Step 2: Convert to fraction form
    283,639.53/391,422.54 = 156,315.13/x
  3. Step 3: Cross multiply
    283,639.53x = 391,422.54 × 156,315.13
  4. Step 4: Simplify right side
    283,639.53x = 61,185,265,225.03
  5. Step 5: Solve for x
    x = 61,185,265,225.03/283,639.53
  6. Step 6: Final answer
    x = 215,714.87

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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.