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Finding the Fourth Proportional to 948.52, 1,421.16 and 515.98

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Solution

The fourth proportional to 948.52, 1,421.16 and 515.98 is: 773.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.52 : 1,421.16 = 515.98 : x
  2. Step 2: Convert to fraction form
    948.52/1,421.16 = 515.98/x
  3. Step 3: Cross multiply
    948.52x = 1,421.16 × 515.98
  4. Step 4: Simplify right side
    948.52x = 733,290.14
  5. Step 5: Solve for x
    x = 733,290.14/948.52
  6. Step 6: Final answer
    x = 773.09

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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.