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Finding the Fourth Proportional to 487.19, 671.93 and 424.91

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Solution

The fourth proportional to 487.19, 671.93 and 424.91 is: 586.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.19 : 671.93 = 424.91 : x
  2. Step 2: Convert to fraction form
    487.19/671.93 = 424.91/x
  3. Step 3: Cross multiply
    487.19x = 671.93 × 424.91
  4. Step 4: Simplify right side
    487.19x = 285,504.29
  5. Step 5: Solve for x
    x = 285,504.29/487.19
  6. Step 6: Final answer
    x = 586.03

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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.