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Finding the Fourth Proportional to 1,024.49, 1,535.99 and 408.01

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Solution

The fourth proportional to 1,024.49, 1,535.99 and 408.01 is: 611.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,024.49 : 1,535.99 = 408.01 : x
  2. Step 2: Convert to fraction form
    1,024.49/1,535.99 = 408.01/x
  3. Step 3: Cross multiply
    1,024.49x = 1,535.99 × 408.01
  4. Step 4: Simplify right side
    1,024.49x = 626,699.28
  5. Step 5: Solve for x
    x = 626,699.28/1,024.49
  6. Step 6: Final answer
    x = 611.72

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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.