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Finding the Fourth Proportional to 279,470.70, 385,676.46 and 152,153.28

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Solution

The fourth proportional to 279,470.70, 385,676.46 and 152,153.28 is: 209,975.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,470.70 : 385,676.46 = 152,153.28 : x
  2. Step 2: Convert to fraction form
    279,470.70/385,676.46 = 152,153.28/x
  3. Step 3: Cross multiply
    279,470.70x = 385,676.46 × 152,153.28
  4. Step 4: Simplify right side
    279,470.70x = 58,681,938,407.79
  5. Step 5: Solve for x
    x = 58,681,938,407.79/279,470.70
  6. Step 6: Final answer
    x = 209,975.28

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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.