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Finding the Fourth Proportional to 610.73, 843.36 and 390.07

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Solution

The fourth proportional to 610.73, 843.36 and 390.07 is: 538.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.73 : 843.36 = 390.07 : x
  2. Step 2: Convert to fraction form
    610.73/843.36 = 390.07/x
  3. Step 3: Cross multiply
    610.73x = 843.36 × 390.07
  4. Step 4: Simplify right side
    610.73x = 328,966.48
  5. Step 5: Solve for x
    x = 328,966.48/610.73
  6. Step 6: Final answer
    x = 538.65

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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.