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Finding the Fourth Proportional to 610.07, 912.33 and 390.15

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Solution

The fourth proportional to 610.07, 912.33 and 390.15 is: 583.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.07 : 912.33 = 390.15 : x
  2. Step 2: Convert to fraction form
    610.07/912.33 = 390.15/x
  3. Step 3: Cross multiply
    610.07x = 912.33 × 390.15
  4. Step 4: Simplify right side
    610.07x = 355,945.55
  5. Step 5: Solve for x
    x = 355,945.55/610.07
  6. Step 6: Final answer
    x = 583.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.