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Finding the Fourth Proportional to 663.50, 988.67 and 590.81

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Solution

The fourth proportional to 663.50, 988.67 and 590.81 is: 880.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.50 : 988.67 = 590.81 : x
  2. Step 2: Convert to fraction form
    663.50/988.67 = 590.81/x
  3. Step 3: Cross multiply
    663.50x = 988.67 × 590.81
  4. Step 4: Simplify right side
    663.50x = 584,108.23
  5. Step 5: Solve for x
    x = 584,108.23/663.50
  6. Step 6: Final answer
    x = 880.35

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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.