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Finding the Fourth Proportional to 416.30, 571.06 and 391.46

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Solution

The fourth proportional to 416.30, 571.06 and 391.46 is: 536.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.30 : 571.06 = 391.46 : x
  2. Step 2: Convert to fraction form
    416.30/571.06 = 391.46/x
  3. Step 3: Cross multiply
    416.30x = 571.06 × 391.46
  4. Step 4: Simplify right side
    416.30x = 223,547.15
  5. Step 5: Solve for x
    x = 223,547.15/416.30
  6. Step 6: Final answer
    x = 536.99

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.