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Finding the Fourth Proportional to 279,643.16, 385,913.49 and 152,318.45

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Solution

The fourth proportional to 279,643.16, 385,913.49 and 152,318.45 is: 210,202.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,643.16 : 385,913.49 = 152,318.45 : x
  2. Step 2: Convert to fraction form
    279,643.16/385,913.49 = 152,318.45/x
  3. Step 3: Cross multiply
    279,643.16x = 385,913.49 × 152,318.45
  4. Step 4: Simplify right side
    279,643.16x = 58,781,744,630.89
  5. Step 5: Solve for x
    x = 58,781,744,630.89/279,643.16
  6. Step 6: Final answer
    x = 210,202.69

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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.