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Finding the Fourth Proportional to 451.19, 621.34 and 401.51

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Solution

The fourth proportional to 451.19, 621.34 and 401.51 is: 552.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.19 : 621.34 = 401.51 : x
  2. Step 2: Convert to fraction form
    451.19/621.34 = 401.51/x
  3. Step 3: Cross multiply
    451.19x = 621.34 × 401.51
  4. Step 4: Simplify right side
    451.19x = 249,474.77
  5. Step 5: Solve for x
    x = 249,474.77/451.19
  6. Step 6: Final answer
    x = 552.92

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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.