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Finding the Fourth Proportional to 620,515.18, 930,661.79 and 165,108.88

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Solution

The fourth proportional to 620,515.18, 930,661.79 and 165,108.88 is: 247,633.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,515.18 : 930,661.79 = 165,108.88 : x
  2. Step 2: Convert to fraction form
    620,515.18/930,661.79 = 165,108.88/x
  3. Step 3: Cross multiply
    620,515.18x = 930,661.79 × 165,108.88
  4. Step 4: Simplify right side
    620,515.18x = 153,660,521,152.39
  5. Step 5: Solve for x
    x = 153,660,521,152.39/620,515.18
  6. Step 6: Final answer
    x = 247,633.78

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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.