Home / 1,439.04-1,984.74-966.78

Finding the Fourth Proportional to 1,439.04, 1,984.74 and 966.78

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Solution

The fourth proportional to 1,439.04, 1,984.74 and 966.78 is: 1,333.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.04 : 1,984.74 = 966.78 : x
  2. Step 2: Convert to fraction form
    1,439.04/1,984.74 = 966.78/x
  3. Step 3: Cross multiply
    1,439.04x = 1,984.74 × 966.78
  4. Step 4: Simplify right side
    1,439.04x = 1,918,806.94
  5. Step 5: Solve for x
    x = 1,918,806.94/1,439.04
  6. Step 6: Final answer
    x = 1,333.39

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Half scale
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Double scale
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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.