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Finding the Fourth Proportional to 489,038.40, 674,862.24 and 274,190.40

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Solution

The fourth proportional to 489,038.40, 674,862.24 and 274,190.40 is: 378,376.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,038.40 : 674,862.24 = 274,190.40 : x
  2. Step 2: Convert to fraction form
    489,038.40/674,862.24 = 274,190.40/x
  3. Step 3: Cross multiply
    489,038.40x = 674,862.24 × 274,190.40
  4. Step 4: Simplify right side
    489,038.40x = 185,040,747,530.50
  5. Step 5: Solve for x
    x = 185,040,747,530.50/489,038.40
  6. Step 6: Final answer
    x = 378,376.72

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1.5x scale

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.