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Finding the Fourth Proportional to 482,787, 666,261.21 and 278,834.13

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Solution

The fourth proportional to 482,787, 666,261.21 and 278,834.13 is: 384,799.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,787 : 666,261.21 = 278,834.13 : x
  2. Step 2: Convert to fraction form
    482,787/666,261.21 = 278,834.13/x
  3. Step 3: Cross multiply
    482,787x = 666,261.21 × 278,834.13
  4. Step 4: Simplify right side
    482,787x = 185,776,364,843.10
  5. Step 5: Solve for x
    x = 185,776,364,843.10/482,787
  6. Step 6: Final answer
    x = 384,799.85

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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.