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Finding the Fourth Proportional to 460.47, 635.00 and 390.45

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Solution

The fourth proportional to 460.47, 635.00 and 390.45 is: 538.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.47 : 635.00 = 390.45 : x
  2. Step 2: Convert to fraction form
    460.47/635.00 = 390.45/x
  3. Step 3: Cross multiply
    460.47x = 635.00 × 390.45
  4. Step 4: Simplify right side
    460.47x = 247,933.80
  5. Step 5: Solve for x
    x = 247,933.80/460.47
  6. Step 6: Final answer
    x = 538.44

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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.