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Finding the Fourth Proportional to 279,630.84, 385,890.40 and 152,306.48

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Solution

The fourth proportional to 279,630.84, 385,890.40 and 152,306.48 is: 210,182.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,630.84 : 385,890.40 = 152,306.48 : x
  2. Step 2: Convert to fraction form
    279,630.84/385,890.40 = 152,306.48/x
  3. Step 3: Cross multiply
    279,630.84x = 385,890.40 × 152,306.48
  4. Step 4: Simplify right side
    279,630.84x = 58,773,608,489.79
  5. Step 5: Solve for x
    x = 58,773,608,489.79/279,630.84
  6. Step 6: Final answer
    x = 210,182.86

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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.