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Finding the Fourth Proportional to 465.49, 642.59 and 291.07

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Solution

The fourth proportional to 465.49, 642.59 and 291.07 is: 401.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.49 : 642.59 = 291.07 : x
  2. Step 2: Convert to fraction form
    465.49/642.59 = 291.07/x
  3. Step 3: Cross multiply
    465.49x = 642.59 × 291.07
  4. Step 4: Simplify right side
    465.49x = 187,038.67
  5. Step 5: Solve for x
    x = 187,038.67/465.49
  6. Step 6: Final answer
    x = 401.81

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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.