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Finding the Fourth Proportional to 807.48, 1,204.35 and 684.90

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Solution

The fourth proportional to 807.48, 1,204.35 and 684.90 is: 1,021.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.48 : 1,204.35 = 684.90 : x
  2. Step 2: Convert to fraction form
    807.48/1,204.35 = 684.90/x
  3. Step 3: Cross multiply
    807.48x = 1,204.35 × 684.90
  4. Step 4: Simplify right side
    807.48x = 824,859.32
  5. Step 5: Solve for x
    x = 824,859.32/807.48
  6. Step 6: Final answer
    x = 1,021.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.