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Finding the Fourth Proportional to 279,706.68, 386,005.14 and 158,844.60

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Solution

The fourth proportional to 279,706.68, 386,005.14 and 158,844.60 is: 219,211.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,706.68 : 386,005.14 = 158,844.60 : x
  2. Step 2: Convert to fraction form
    279,706.68/386,005.14 = 158,844.60/x
  3. Step 3: Cross multiply
    279,706.68x = 386,005.14 × 158,844.60
  4. Step 4: Simplify right side
    279,706.68x = 61,314,832,061.24
  5. Step 5: Solve for x
    x = 61,314,832,061.24/279,706.68
  6. Step 6: Final answer
    x = 219,211.18

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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.