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Finding the Fourth Proportional to 672.18, 926.37 and 497.58

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Solution

The fourth proportional to 672.18, 926.37 and 497.58 is: 685.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.18 : 926.37 = 497.58 : x
  2. Step 2: Convert to fraction form
    672.18/926.37 = 497.58/x
  3. Step 3: Cross multiply
    672.18x = 926.37 × 497.58
  4. Step 4: Simplify right side
    672.18x = 460,943.18
  5. Step 5: Solve for x
    x = 460,943.18/672.18
  6. Step 6: Final answer
    x = 685.74

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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.