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Finding the Fourth Proportional to 279,080.40, 385,126.56 and 151,754.88

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Solution

The fourth proportional to 279,080.40, 385,126.56 and 151,754.88 is: 209,419.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,080.40 : 385,126.56 = 151,754.88 : x
  2. Step 2: Convert to fraction form
    279,080.40/385,126.56 = 151,754.88/x
  3. Step 3: Cross multiply
    279,080.40x = 385,126.56 × 151,754.88
  4. Step 4: Simplify right side
    279,080.40x = 58,444,834,897.61
  5. Step 5: Solve for x
    x = 58,444,834,897.61/279,080.40
  6. Step 6: Final answer
    x = 209,419.35

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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.