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Finding the Fourth Proportional to 939.03, 1,288.91 and 898.93

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Solution

The fourth proportional to 939.03, 1,288.91 and 898.93 is: 1,233.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.03 : 1,288.91 = 898.93 : x
  2. Step 2: Convert to fraction form
    939.03/1,288.91 = 898.93/x
  3. Step 3: Cross multiply
    939.03x = 1,288.91 × 898.93
  4. Step 4: Simplify right side
    939.03x = 1,158,639.87
  5. Step 5: Solve for x
    x = 1,158,639.87/939.03
  6. Step 6: Final answer
    x = 1,233.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.