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Finding the Fourth Proportional to 279,275.83, 418,978.55 and 92,275.99

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Solution

The fourth proportional to 279,275.83, 418,978.55 and 92,275.99 is: 138,435.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,275.83 : 418,978.55 = 92,275.99 : x
  2. Step 2: Convert to fraction form
    279,275.83/418,978.55 = 92,275.99/x
  3. Step 3: Cross multiply
    279,275.83x = 418,978.55 × 92,275.99
  4. Step 4: Simplify right side
    279,275.83x = 38,661,660,490.01
  5. Step 5: Solve for x
    x = 38,661,660,490.01/279,275.83
  6. Step 6: Final answer
    x = 138,435.40

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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.