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Finding the Fourth Proportional to 908.18, 1,252.75 and 612.93

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Solution

The fourth proportional to 908.18, 1,252.75 and 612.93 is: 845.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.18 : 1,252.75 = 612.93 : x
  2. Step 2: Convert to fraction form
    908.18/1,252.75 = 612.93/x
  3. Step 3: Cross multiply
    908.18x = 1,252.75 × 612.93
  4. Step 4: Simplify right side
    908.18x = 767,848.06
  5. Step 5: Solve for x
    x = 767,848.06/908.18
  6. Step 6: Final answer
    x = 845.48

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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.