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Finding the Fourth Proportional to 279,043.20, 385,075.08 and 151,722

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Solution

The fourth proportional to 279,043.20, 385,075.08 and 151,722 is: 209,373.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,043.20 : 385,075.08 = 151,722 : x
  2. Step 2: Convert to fraction form
    279,043.20/385,075.08 = 151,722/x
  3. Step 3: Cross multiply
    279,043.20x = 385,075.08 × 151,722
  4. Step 4: Simplify right side
    279,043.20x = 58,424,361,287.76
  5. Step 5: Solve for x
    x = 58,424,361,287.76/279,043.20
  6. Step 6: Final answer
    x = 209,373.89

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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.