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Finding the Fourth Proportional to 279,043.70, 385,075.77 and 151,722.50

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Solution

The fourth proportional to 279,043.70, 385,075.77 and 151,722.50 is: 209,374.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,043.70 : 385,075.77 = 151,722.50 : x
  2. Step 2: Convert to fraction form
    279,043.70/385,075.77 = 151,722.50/x
  3. Step 3: Cross multiply
    279,043.70x = 385,075.77 × 151,722.50
  4. Step 4: Simplify right side
    279,043.70x = 58,424,658,513.83
  5. Step 5: Solve for x
    x = 58,424,658,513.83/279,043.70
  6. Step 6: Final answer
    x = 209,374.58

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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.