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Finding the Fourth Proportional to 810.64, 1,118.80 and 590.32

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Solution

The fourth proportional to 810.64, 1,118.80 and 590.32 is: 814.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.64 : 1,118.80 = 590.32 : x
  2. Step 2: Convert to fraction form
    810.64/1,118.80 = 590.32/x
  3. Step 3: Cross multiply
    810.64x = 1,118.80 × 590.32
  4. Step 4: Simplify right side
    810.64x = 660,450.02
  5. Step 5: Solve for x
    x = 660,450.02/810.64
  6. Step 6: Final answer
    x = 814.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.