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Finding the Fourth Proportional to 218,959.20, 328,438.80 and 174,672.45

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Solution

The fourth proportional to 218,959.20, 328,438.80 and 174,672.45 is: 262,008.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,959.20 : 328,438.80 = 174,672.45 : x
  2. Step 2: Convert to fraction form
    218,959.20/328,438.80 = 174,672.45/x
  3. Step 3: Cross multiply
    218,959.20x = 328,438.80 × 174,672.45
  4. Step 4: Simplify right side
    218,959.20x = 57,369,209,871.06
  5. Step 5: Solve for x
    x = 57,369,209,871.06/218,959.20
  6. Step 6: Final answer
    x = 262,008.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.