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Finding the Fourth Proportional to 279,729.90, 418,610.70 and 256,110.30

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Solution

The fourth proportional to 279,729.90, 418,610.70 and 256,110.30 is: 383,264.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,729.90 : 418,610.70 = 256,110.30 : x
  2. Step 2: Convert to fraction form
    279,729.90/418,610.70 = 256,110.30/x
  3. Step 3: Cross multiply
    279,729.90x = 418,610.70 × 256,110.30
  4. Step 4: Simplify right side
    279,729.90x = 107,210,511,960.21
  5. Step 5: Solve for x
    x = 107,210,511,960.21/279,729.90
  6. Step 6: Final answer
    x = 383,264.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.