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Finding the Fourth Proportional to 988.72, 1,484.28 and 906.10

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Solution

The fourth proportional to 988.72, 1,484.28 and 906.10 is: 1,360.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.72 : 1,484.28 = 906.10 : x
  2. Step 2: Convert to fraction form
    988.72/1,484.28 = 906.10/x
  3. Step 3: Cross multiply
    988.72x = 1,484.28 × 906.10
  4. Step 4: Simplify right side
    988.72x = 1,344,906.11
  5. Step 5: Solve for x
    x = 1,344,906.11/988.72
  6. Step 6: Final answer
    x = 1,360.25

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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.