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Finding the Fourth Proportional to 607.20, 838.40 and 467.10

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Solution

The fourth proportional to 607.20, 838.40 and 467.10 is: 644.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.20 : 838.40 = 467.10 : x
  2. Step 2: Convert to fraction form
    607.20/838.40 = 467.10/x
  3. Step 3: Cross multiply
    607.20x = 838.40 × 467.10
  4. Step 4: Simplify right side
    607.20x = 391,616.64
  5. Step 5: Solve for x
    x = 391,616.64/607.20
  6. Step 6: Final answer
    x = 644.95

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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.