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Finding the Fourth Proportional to 726.18, 1,089.16 and 603.57

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Solution

The fourth proportional to 726.18, 1,089.16 and 603.57 is: 905.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.18 : 1,089.16 = 603.57 : x
  2. Step 2: Convert to fraction form
    726.18/1,089.16 = 603.57/x
  3. Step 3: Cross multiply
    726.18x = 1,089.16 × 603.57
  4. Step 4: Simplify right side
    726.18x = 657,384.38
  5. Step 5: Solve for x
    x = 657,384.38/726.18
  6. Step 6: Final answer
    x = 905.26

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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.