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Finding the Fourth Proportional to 488.61, 731.55 and 305.55

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Solution

The fourth proportional to 488.61, 731.55 and 305.55 is: 457.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.61 : 731.55 = 305.55 : x
  2. Step 2: Convert to fraction form
    488.61/731.55 = 305.55/x
  3. Step 3: Cross multiply
    488.61x = 731.55 × 305.55
  4. Step 4: Simplify right side
    488.61x = 223,525.10
  5. Step 5: Solve for x
    x = 223,525.10/488.61
  6. Step 6: Final answer
    x = 457.47

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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.