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Finding the Fourth Proportional to 988.91, 1,484.09 and 441.45

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Solution

The fourth proportional to 988.91, 1,484.09 and 441.45 is: 662.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.91 : 1,484.09 = 441.45 : x
  2. Step 2: Convert to fraction form
    988.91/1,484.09 = 441.45/x
  3. Step 3: Cross multiply
    988.91x = 1,484.09 × 441.45
  4. Step 4: Simplify right side
    988.91x = 655,150.98
  5. Step 5: Solve for x
    x = 655,150.98/988.91
  6. Step 6: Final answer
    x = 662.50

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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.