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Finding the Fourth Proportional to 527.10, 790.55 and 321.63

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Solution

The fourth proportional to 527.10, 790.55 and 321.63 is: 482.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.10 : 790.55 = 321.63 : x
  2. Step 2: Convert to fraction form
    527.10/790.55 = 321.63/x
  3. Step 3: Cross multiply
    527.10x = 790.55 × 321.63
  4. Step 4: Simplify right side
    527.10x = 254,264.60
  5. Step 5: Solve for x
    x = 254,264.60/527.10
  6. Step 6: Final answer
    x = 482.38

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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.