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Finding the Fourth Proportional to 307,528.50, 461,370.52 and 85,912.50

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Solution

The fourth proportional to 307,528.50, 461,370.52 and 85,912.50 is: 128,890.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,528.50 : 461,370.52 = 85,912.50 : x
  2. Step 2: Convert to fraction form
    307,528.50/461,370.52 = 85,912.50/x
  3. Step 3: Cross multiply
    307,528.50x = 461,370.52 × 85,912.50
  4. Step 4: Simplify right side
    307,528.50x = 39,637,494,799.50
  5. Step 5: Solve for x
    x = 39,637,494,799.50/307,528.50
  6. Step 6: Final answer
    x = 128,890.48

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1.5x scale

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.