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Finding the Fourth Proportional to 285,815.67, 428,723.66 and 72,599.58

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Solution

The fourth proportional to 285,815.67, 428,723.66 and 72,599.58 is: 108,899.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,815.67 : 428,723.66 = 72,599.58 : x
  2. Step 2: Convert to fraction form
    285,815.67/428,723.66 = 72,599.58/x
  3. Step 3: Cross multiply
    285,815.67x = 428,723.66 × 72,599.58
  4. Step 4: Simplify right side
    285,815.67x = 31,125,157,289.06
  5. Step 5: Solve for x
    x = 31,125,157,289.06/285,815.67
  6. Step 6: Final answer
    x = 108,899.41

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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.