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Finding the Fourth Proportional to 527.94, 728.50 and 303.90

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Solution

The fourth proportional to 527.94, 728.50 and 303.90 is: 419.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.94 : 728.50 = 303.90 : x
  2. Step 2: Convert to fraction form
    527.94/728.50 = 303.90/x
  3. Step 3: Cross multiply
    527.94x = 728.50 × 303.90
  4. Step 4: Simplify right side
    527.94x = 221,391.15
  5. Step 5: Solve for x
    x = 221,391.15/527.94
  6. Step 6: Final answer
    x = 419.35

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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.