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Finding the Fourth Proportional to 279,476.70, 385,684.78 and 152,159.28

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Solution

The fourth proportional to 279,476.70, 385,684.78 and 152,159.28 is: 209,983.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,476.70 : 385,684.78 = 152,159.28 : x
  2. Step 2: Convert to fraction form
    279,476.70/385,684.78 = 152,159.28/x
  3. Step 3: Cross multiply
    279,476.70x = 385,684.78 × 152,159.28
  4. Step 4: Simplify right side
    279,476.70x = 58,685,518,431.76
  5. Step 5: Solve for x
    x = 58,685,518,431.76/279,476.70
  6. Step 6: Final answer
    x = 209,983.58

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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.