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Finding the Fourth Proportional to 813.84, 1,220.98 and 467.34

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Solution

The fourth proportional to 813.84, 1,220.98 and 467.34 is: 701.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    813.84 : 1,220.98 = 467.34 : x
  2. Step 2: Convert to fraction form
    813.84/1,220.98 = 467.34/x
  3. Step 3: Cross multiply
    813.84x = 1,220.98 × 467.34
  4. Step 4: Simplify right side
    813.84x = 570,612.79
  5. Step 5: Solve for x
    x = 570,612.79/813.84
  6. Step 6: Final answer
    x = 701.14

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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.