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Finding the Fourth Proportional to 354,426.77, 489,517.36 and 258,061.57

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Solution

The fourth proportional to 354,426.77, 489,517.36 and 258,061.57 is: 356,422.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,426.77 : 489,517.36 = 258,061.57 : x
  2. Step 2: Convert to fraction form
    354,426.77/489,517.36 = 258,061.57/x
  3. Step 3: Cross multiply
    354,426.77x = 489,517.36 × 258,061.57
  4. Step 4: Simplify right side
    354,426.77x = 126,325,621,114.30
  5. Step 5: Solve for x
    x = 126,325,621,114.30/354,426.77
  6. Step 6: Final answer
    x = 356,422.34

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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.