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Finding the Fourth Proportional to 989.18, 1,483.09 and 433.62

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Solution

The fourth proportional to 989.18, 1,483.09 and 433.62 is: 650.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.18 : 1,483.09 = 433.62 : x
  2. Step 2: Convert to fraction form
    989.18/1,483.09 = 433.62/x
  3. Step 3: Cross multiply
    989.18x = 1,483.09 × 433.62
  4. Step 4: Simplify right side
    989.18x = 643,097.49
  5. Step 5: Solve for x
    x = 643,097.49/989.18
  6. Step 6: Final answer
    x = 650.13

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.