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Finding the Fourth Proportional to 351,870.40, 527,805.60 and 85,628.80

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Solution

The fourth proportional to 351,870.40, 527,805.60 and 85,628.80 is: 128,443.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,870.40 : 527,805.60 = 85,628.80 : x
  2. Step 2: Convert to fraction form
    351,870.40/527,805.60 = 85,628.80/x
  3. Step 3: Cross multiply
    351,870.40x = 527,805.60 × 85,628.80
  4. Step 4: Simplify right side
    351,870.40x = 45,195,360,161.28
  5. Step 5: Solve for x
    x = 45,195,360,161.28/351,870.40
  6. Step 6: Final answer
    x = 128,443.20

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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.