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Finding the Fourth Proportional to 947.55, 1,421.52 and 298.29

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Solution

The fourth proportional to 947.55, 1,421.52 and 298.29 is: 447.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.55 : 1,421.52 = 298.29 : x
  2. Step 2: Convert to fraction form
    947.55/1,421.52 = 298.29/x
  3. Step 3: Cross multiply
    947.55x = 1,421.52 × 298.29
  4. Step 4: Simplify right side
    947.55x = 424,025.20
  5. Step 5: Solve for x
    x = 424,025.20/947.55
  6. Step 6: Final answer
    x = 447.50

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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.