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Finding the Fourth Proportional to 310,422.80, 465,715.20 and 100,065.80

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Solution

The fourth proportional to 310,422.80, 465,715.20 and 100,065.80 is: 150,124.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,422.80 : 465,715.20 = 100,065.80 : x
  2. Step 2: Convert to fraction form
    310,422.80/465,715.20 = 100,065.80/x
  3. Step 3: Cross multiply
    310,422.80x = 465,715.20 × 100,065.80
  4. Step 4: Simplify right side
    310,422.80x = 46,602,164,060.16
  5. Step 5: Solve for x
    x = 46,602,164,060.16/310,422.80
  6. Step 6: Final answer
    x = 150,124.81

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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.