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Finding the Fourth Proportional to 450.51, 621.61 and 284.95

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Solution

The fourth proportional to 450.51, 621.61 and 284.95 is: 393.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.51 : 621.61 = 284.95 : x
  2. Step 2: Convert to fraction form
    450.51/621.61 = 284.95/x
  3. Step 3: Cross multiply
    450.51x = 621.61 × 284.95
  4. Step 4: Simplify right side
    450.51x = 177,127.77
  5. Step 5: Solve for x
    x = 177,127.77/450.51
  6. Step 6: Final answer
    x = 393.17

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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.