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Finding the Fourth Proportional to 807.88, 1,114.98 and 493.33

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Solution

The fourth proportional to 807.88, 1,114.98 and 493.33 is: 680.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.88 : 1,114.98 = 493.33 : x
  2. Step 2: Convert to fraction form
    807.88/1,114.98 = 493.33/x
  3. Step 3: Cross multiply
    807.88x = 1,114.98 × 493.33
  4. Step 4: Simplify right side
    807.88x = 550,053.08
  5. Step 5: Solve for x
    x = 550,053.08/807.88
  6. Step 6: Final answer
    x = 680.86

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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.