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Finding the Fourth Proportional to 941.68, 1,412.76 and 551.20

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Solution

The fourth proportional to 941.68, 1,412.76 and 551.20 is: 826.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.68 : 1,412.76 = 551.20 : x
  2. Step 2: Convert to fraction form
    941.68/1,412.76 = 551.20/x
  3. Step 3: Cross multiply
    941.68x = 1,412.76 × 551.20
  4. Step 4: Simplify right side
    941.68x = 778,713.31
  5. Step 5: Solve for x
    x = 778,713.31/941.68
  6. Step 6: Final answer
    x = 826.94

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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.