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Finding the Fourth Proportional to 918.66, 1,377.30 and 589.80

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Solution

The fourth proportional to 918.66, 1,377.30 and 589.80 is: 884.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.66 : 1,377.30 = 589.80 : x
  2. Step 2: Convert to fraction form
    918.66/1,377.30 = 589.80/x
  3. Step 3: Cross multiply
    918.66x = 1,377.30 × 589.80
  4. Step 4: Simplify right side
    918.66x = 812,331.54
  5. Step 5: Solve for x
    x = 812,331.54/918.66
  6. Step 6: Final answer
    x = 884.26

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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.