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Finding the Fourth Proportional to 802.57, 1,108.05 and 655.55

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Solution

The fourth proportional to 802.57, 1,108.05 and 655.55 is: 905.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.57 : 1,108.05 = 655.55 : x
  2. Step 2: Convert to fraction form
    802.57/1,108.05 = 655.55/x
  3. Step 3: Cross multiply
    802.57x = 1,108.05 × 655.55
  4. Step 4: Simplify right side
    802.57x = 726,382.18
  5. Step 5: Solve for x
    x = 726,382.18/802.57
  6. Step 6: Final answer
    x = 905.07

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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.