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Finding the Fourth Proportional to 948.67, 1,308.98 and 528.95

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Solution

The fourth proportional to 948.67, 1,308.98 and 528.95 is: 729.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.67 : 1,308.98 = 528.95 : x
  2. Step 2: Convert to fraction form
    948.67/1,308.98 = 528.95/x
  3. Step 3: Cross multiply
    948.67x = 1,308.98 × 528.95
  4. Step 4: Simplify right side
    948.67x = 692,389.57
  5. Step 5: Solve for x
    x = 692,389.57/948.67
  6. Step 6: Final answer
    x = 729.85

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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.