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Finding the Fourth Proportional to 808.98, 1,214.20 and 501.42

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Solution

The fourth proportional to 808.98, 1,214.20 and 501.42 is: 752.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.98 : 1,214.20 = 501.42 : x
  2. Step 2: Convert to fraction form
    808.98/1,214.20 = 501.42/x
  3. Step 3: Cross multiply
    808.98x = 1,214.20 × 501.42
  4. Step 4: Simplify right side
    808.98x = 608,824.16
  5. Step 5: Solve for x
    x = 608,824.16/808.98
  6. Step 6: Final answer
    x = 752.58

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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.