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Finding the Fourth Proportional to 988.72, 1,476.67 and 895.99

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Solution

The fourth proportional to 988.72, 1,476.67 and 895.99 is: 1,338.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.72 : 1,476.67 = 895.99 : x
  2. Step 2: Convert to fraction form
    988.72/1,476.67 = 895.99/x
  3. Step 3: Cross multiply
    988.72x = 1,476.67 × 895.99
  4. Step 4: Simplify right side
    988.72x = 1,323,081.55
  5. Step 5: Solve for x
    x = 1,323,081.55/988.72
  6. Step 6: Final answer
    x = 1,338.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.