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Finding the Fourth Proportional to 1,071.56, 1,478.76 and 599.51

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Solution

The fourth proportional to 1,071.56, 1,478.76 and 599.51 is: 827.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.56 : 1,478.76 = 599.51 : x
  2. Step 2: Convert to fraction form
    1,071.56/1,478.76 = 599.51/x
  3. Step 3: Cross multiply
    1,071.56x = 1,478.76 × 599.51
  4. Step 4: Simplify right side
    1,071.56x = 886,531.41
  5. Step 5: Solve for x
    x = 886,531.41/1,071.56
  6. Step 6: Final answer
    x = 827.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.