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Finding the Fourth Proportional to 607.91, 908.55 and 491.13

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Solution

The fourth proportional to 607.91, 908.55 and 491.13 is: 734.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.91 : 908.55 = 491.13 : x
  2. Step 2: Convert to fraction form
    607.91/908.55 = 491.13/x
  3. Step 3: Cross multiply
    607.91x = 908.55 × 491.13
  4. Step 4: Simplify right side
    607.91x = 446,216.16
  5. Step 5: Solve for x
    x = 446,216.16/607.91
  6. Step 6: Final answer
    x = 734.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.