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Finding the Fourth Proportional to 1,023.42, 1,412.32 and 603.78

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Solution

The fourth proportional to 1,023.42, 1,412.32 and 603.78 is: 833.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,023.42 : 1,412.32 = 603.78 : x
  2. Step 2: Convert to fraction form
    1,023.42/1,412.32 = 603.78/x
  3. Step 3: Cross multiply
    1,023.42x = 1,412.32 × 603.78
  4. Step 4: Simplify right side
    1,023.42x = 852,731.42
  5. Step 5: Solve for x
    x = 852,731.42/1,023.42
  6. Step 6: Final answer
    x = 833.22

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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.