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Finding the Fourth Proportional to 948.20, 1,308.49 and 534.20

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Solution

The fourth proportional to 948.20, 1,308.49 and 534.20 is: 737.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.20 : 1,308.49 = 534.20 : x
  2. Step 2: Convert to fraction form
    948.20/1,308.49 = 534.20/x
  3. Step 3: Cross multiply
    948.20x = 1,308.49 × 534.20
  4. Step 4: Simplify right side
    948.20x = 698,995.36
  5. Step 5: Solve for x
    x = 698,995.36/948.20
  6. Step 6: Final answer
    x = 737.18

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1.5x scale

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.