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Finding the Fourth Proportional to 483.89, 728.57 and 426.48

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Solution

The fourth proportional to 483.89, 728.57 and 426.48 is: 642.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.89 : 728.57 = 426.48 : x
  2. Step 2: Convert to fraction form
    483.89/728.57 = 426.48/x
  3. Step 3: Cross multiply
    483.89x = 728.57 × 426.48
  4. Step 4: Simplify right side
    483.89x = 310,718.40
  5. Step 5: Solve for x
    x = 310,718.40/483.89
  6. Step 6: Final answer
    x = 642.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.