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Finding the Fourth Proportional to 426.98, 640.51 and 183.45

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Solution

The fourth proportional to 426.98, 640.51 and 183.45 is: 275.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.98 : 640.51 = 183.45 : x
  2. Step 2: Convert to fraction form
    426.98/640.51 = 183.45/x
  3. Step 3: Cross multiply
    426.98x = 640.51 × 183.45
  4. Step 4: Simplify right side
    426.98x = 117,501.10
  5. Step 5: Solve for x
    x = 117,501.10/426.98
  6. Step 6: Final answer
    x = 275.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.