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Finding the Fourth Proportional to 279,266.40, 418,867.20 and 79,617.60

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Solution

The fourth proportional to 279,266.40, 418,867.20 and 79,617.60 is: 119,417.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,266.40 : 418,867.20 = 79,617.60 : x
  2. Step 2: Convert to fraction form
    279,266.40/418,867.20 = 79,617.60/x
  3. Step 3: Cross multiply
    279,266.40x = 418,867.20 × 79,617.60
  4. Step 4: Simplify right side
    279,266.40x = 33,349,201,182.72
  5. Step 5: Solve for x
    x = 33,349,201,182.72/279,266.40
  6. Step 6: Final answer
    x = 119,417.16

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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.