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Finding the Fourth Proportional to 988.34, 1,482.46 and 330.17

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Solution

The fourth proportional to 988.34, 1,482.46 and 330.17 is: 495.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.34 : 1,482.46 = 330.17 : x
  2. Step 2: Convert to fraction form
    988.34/1,482.46 = 330.17/x
  3. Step 3: Cross multiply
    988.34x = 1,482.46 × 330.17
  4. Step 4: Simplify right side
    988.34x = 489,455.58
  5. Step 5: Solve for x
    x = 489,455.58/988.34
  6. Step 6: Final answer
    x = 495.23

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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.