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Finding the Fourth Proportional to 427.88, 638.98 and 373.16

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Solution

The fourth proportional to 427.88, 638.98 and 373.16 is: 557.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.88 : 638.98 = 373.16 : x
  2. Step 2: Convert to fraction form
    427.88/638.98 = 373.16/x
  3. Step 3: Cross multiply
    427.88x = 638.98 × 373.16
  4. Step 4: Simplify right side
    427.88x = 238,441.78
  5. Step 5: Solve for x
    x = 238,441.78/427.88
  6. Step 6: Final answer
    x = 557.26

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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.