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Finding the Fourth Proportional to 959.49, 1,439.10 and 310.23

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Solution

The fourth proportional to 959.49, 1,439.10 and 310.23 is: 465.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.49 : 1,439.10 = 310.23 : x
  2. Step 2: Convert to fraction form
    959.49/1,439.10 = 310.23/x
  3. Step 3: Cross multiply
    959.49x = 1,439.10 × 310.23
  4. Step 4: Simplify right side
    959.49x = 446,451.99
  5. Step 5: Solve for x
    x = 446,451.99/959.49
  6. Step 6: Final answer
    x = 465.30

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.