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Finding the Fourth Proportional to 1,071.59, 1,607.39 and 486.47

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Solution

The fourth proportional to 1,071.59, 1,607.39 and 486.47 is: 729.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.59 : 1,607.39 = 486.47 : x
  2. Step 2: Convert to fraction form
    1,071.59/1,607.39 = 486.47/x
  3. Step 3: Cross multiply
    1,071.59x = 1,607.39 × 486.47
  4. Step 4: Simplify right side
    1,071.59x = 781,936.54
  5. Step 5: Solve for x
    x = 781,936.54/1,071.59
  6. Step 6: Final answer
    x = 729.70

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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.