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Finding the Fourth Proportional to 905.43, 1,355.58 and 675.39

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Solution

The fourth proportional to 905.43, 1,355.58 and 675.39 is: 1,011.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.43 : 1,355.58 = 675.39 : x
  2. Step 2: Convert to fraction form
    905.43/1,355.58 = 675.39/x
  3. Step 3: Cross multiply
    905.43x = 1,355.58 × 675.39
  4. Step 4: Simplify right side
    905.43x = 915,545.18
  5. Step 5: Solve for x
    x = 915,545.18/905.43
  6. Step 6: Final answer
    x = 1,011.17

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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.