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Finding the Fourth Proportional to 989.49, 1,483.16 and 624.45

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Solution

The fourth proportional to 989.49, 1,483.16 and 624.45 is: 935.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.49 : 1,483.16 = 624.45 : x
  2. Step 2: Convert to fraction form
    989.49/1,483.16 = 624.45/x
  3. Step 3: Cross multiply
    989.49x = 1,483.16 × 624.45
  4. Step 4: Simplify right side
    989.49x = 926,156.14
  5. Step 5: Solve for x
    x = 926,156.14/989.49
  6. Step 6: Final answer
    x = 935.99

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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.