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Finding the Fourth Proportional to 858.83, 1,288.56 and 372.23

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Solution

The fourth proportional to 858.83, 1,288.56 and 372.23 is: 558.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.83 : 1,288.56 = 372.23 : x
  2. Step 2: Convert to fraction form
    858.83/1,288.56 = 372.23/x
  3. Step 3: Cross multiply
    858.83x = 1,288.56 × 372.23
  4. Step 4: Simplify right side
    858.83x = 479,634.25
  5. Step 5: Solve for x
    x = 479,634.25/858.83
  6. Step 6: Final answer
    x = 558.47

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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.