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Finding the Fourth Proportional to 1,023.43, 1,412.31 and 581.35

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Solution

The fourth proportional to 1,023.43, 1,412.31 and 581.35 is: 802.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,023.43 : 1,412.31 = 581.35 : x
  2. Step 2: Convert to fraction form
    1,023.43/1,412.31 = 581.35/x
  3. Step 3: Cross multiply
    1,023.43x = 1,412.31 × 581.35
  4. Step 4: Simplify right side
    1,023.43x = 821,046.42
  5. Step 5: Solve for x
    x = 821,046.42/1,023.43
  6. Step 6: Final answer
    x = 802.25

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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.