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Finding the Fourth Proportional to 307.93, 425.10 and 210.20

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Solution

The fourth proportional to 307.93, 425.10 and 210.20 is: 290.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.93 : 425.10 = 210.20 : x
  2. Step 2: Convert to fraction form
    307.93/425.10 = 210.20/x
  3. Step 3: Cross multiply
    307.93x = 425.10 × 210.20
  4. Step 4: Simplify right side
    307.93x = 89,354.97
  5. Step 5: Solve for x
    x = 89,354.97/307.93
  6. Step 6: Final answer
    x = 290.18

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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.