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Finding the Fourth Proportional to 417.30, 630.20 and 417.30

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Solution

The fourth proportional to 417.30, 630.20 and 417.30 is: 630.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.30 : 630.20 = 417.30 : x
  2. Step 2: Convert to fraction form
    417.30/630.20 = 417.30/x
  3. Step 3: Cross multiply
    417.30x = 630.20 × 417.30
  4. Step 4: Simplify right side
    417.30x = 262,980.37
  5. Step 5: Solve for x
    x = 262,980.37/417.30
  6. Step 6: Final answer
    x = 630.20

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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.