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Finding the Fourth Proportional to 1,071.02, 1,604.64 and 745.76

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Solution

The fourth proportional to 1,071.02, 1,604.64 and 745.76 is: 1,117.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.02 : 1,604.64 = 745.76 : x
  2. Step 2: Convert to fraction form
    1,071.02/1,604.64 = 745.76/x
  3. Step 3: Cross multiply
    1,071.02x = 1,604.64 × 745.76
  4. Step 4: Simplify right side
    1,071.02x = 1,196,676.33
  5. Step 5: Solve for x
    x = 1,196,676.33/1,071.02
  6. Step 6: Final answer
    x = 1,117.32

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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.