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Finding the Fourth Proportional to 279,377.40, 419,178.33 and 127,646.40

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Solution

The fourth proportional to 279,377.40, 419,178.33 and 127,646.40 is: 191,520.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,377.40 : 419,178.33 = 127,646.40 : x
  2. Step 2: Convert to fraction form
    279,377.40/419,178.33 = 127,646.40/x
  3. Step 3: Cross multiply
    279,377.40x = 419,178.33 × 127,646.40
  4. Step 4: Simplify right side
    279,377.40x = 53,506,604,782.51
  5. Step 5: Solve for x
    x = 53,506,604,782.51/279,377.40
  6. Step 6: Final answer
    x = 191,520.88

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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.