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Finding the Fourth Proportional to 489.84, 677.04 and 373.20

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Solution

The fourth proportional to 489.84, 677.04 and 373.20 is: 515.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.84 : 677.04 = 373.20 : x
  2. Step 2: Convert to fraction form
    489.84/677.04 = 373.20/x
  3. Step 3: Cross multiply
    489.84x = 677.04 × 373.20
  4. Step 4: Simplify right side
    489.84x = 252,671.33
  5. Step 5: Solve for x
    x = 252,671.33/489.84
  6. Step 6: Final answer
    x = 515.82

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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.