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Finding the Fourth Proportional to 894.60, 1,342.08 and 620.76

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Solution

The fourth proportional to 894.60, 1,342.08 and 620.76 is: 931.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.60 : 1,342.08 = 620.76 : x
  2. Step 2: Convert to fraction form
    894.60/1,342.08 = 620.76/x
  3. Step 3: Cross multiply
    894.60x = 1,342.08 × 620.76
  4. Step 4: Simplify right side
    894.60x = 833,109.58
  5. Step 5: Solve for x
    x = 833,109.58/894.60
  6. Step 6: Final answer
    x = 931.26

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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.