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Finding the Fourth Proportional to 948.80, 1,308.96 and 875.84

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Solution

The fourth proportional to 948.80, 1,308.96 and 875.84 is: 1,208.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.80 : 1,308.96 = 875.84 : x
  2. Step 2: Convert to fraction form
    948.80/1,308.96 = 875.84/x
  3. Step 3: Cross multiply
    948.80x = 1,308.96 × 875.84
  4. Step 4: Simplify right side
    948.80x = 1,146,439.53
  5. Step 5: Solve for x
    x = 1,146,439.53/948.80
  6. Step 6: Final answer
    x = 1,208.30

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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.