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Finding the Fourth Proportional to 307,531.56, 461,375.04 and 85,915.56

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Solution

The fourth proportional to 307,531.56, 461,375.04 and 85,915.56 is: 128,895.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,531.56 : 461,375.04 = 85,915.56 : x
  2. Step 2: Convert to fraction form
    307,531.56/461,375.04 = 85,915.56/x
  3. Step 3: Cross multiply
    307,531.56x = 461,375.04 × 85,915.56
  4. Step 4: Simplify right side
    307,531.56x = 39,639,294,931.62
  5. Step 5: Solve for x
    x = 39,639,294,931.62/307,531.56
  6. Step 6: Final answer
    x = 128,895.05

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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.