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Finding the Fourth Proportional to 527.02, 727.58 and 421.90

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Solution

The fourth proportional to 527.02, 727.58 and 421.90 is: 582.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.02 : 727.58 = 421.90 : x
  2. Step 2: Convert to fraction form
    527.02/727.58 = 421.90/x
  3. Step 3: Cross multiply
    527.02x = 727.58 × 421.90
  4. Step 4: Simplify right side
    527.02x = 306,966.00
  5. Step 5: Solve for x
    x = 306,966.00/527.02
  6. Step 6: Final answer
    x = 582.46

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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.