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Finding the Fourth Proportional to 310,348.89, 465,522.72 and 85,708.75

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Solution

The fourth proportional to 310,348.89, 465,522.72 and 85,708.75 is: 128,562.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,348.89 : 465,522.72 = 85,708.75 : x
  2. Step 2: Convert to fraction form
    310,348.89/465,522.72 = 85,708.75/x
  3. Step 3: Cross multiply
    310,348.89x = 465,522.72 × 85,708.75
  4. Step 4: Simplify right side
    310,348.89x = 39,899,370,427.80
  5. Step 5: Solve for x
    x = 39,899,370,427.80/310,348.89
  6. Step 6: Final answer
    x = 128,562.96

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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.