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Finding the Fourth Proportional to 989.48, 1,484.15 and 249.10

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Solution

The fourth proportional to 989.48, 1,484.15 and 249.10 is: 373.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.48 : 1,484.15 = 249.10 : x
  2. Step 2: Convert to fraction form
    989.48/1,484.15 = 249.10/x
  3. Step 3: Cross multiply
    989.48x = 1,484.15 × 249.10
  4. Step 4: Simplify right side
    989.48x = 369,696.81
  5. Step 5: Solve for x
    x = 369,696.81/989.48
  6. Step 6: Final answer
    x = 373.63

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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.