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Finding the Fourth Proportional to 390.51, 583.22 and 332.11

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Solution

The fourth proportional to 390.51, 583.22 and 332.11 is: 496.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.51 : 583.22 = 332.11 : x
  2. Step 2: Convert to fraction form
    390.51/583.22 = 332.11/x
  3. Step 3: Cross multiply
    390.51x = 583.22 × 332.11
  4. Step 4: Simplify right side
    390.51x = 193,693.19
  5. Step 5: Solve for x
    x = 193,693.19/390.51
  6. Step 6: Final answer
    x = 496.00

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.