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Finding the Fourth Proportional to 969.49, 1,337.52 and 638.08

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Solution

The fourth proportional to 969.49, 1,337.52 and 638.08 is: 880.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.49 : 1,337.52 = 638.08 : x
  2. Step 2: Convert to fraction form
    969.49/1,337.52 = 638.08/x
  3. Step 3: Cross multiply
    969.49x = 1,337.52 × 638.08
  4. Step 4: Simplify right side
    969.49x = 853,444.76
  5. Step 5: Solve for x
    x = 853,444.76/969.49
  6. Step 6: Final answer
    x = 880.30

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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.