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Finding the Fourth Proportional to 1,110.02, 1,665.02 and 561.80

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Solution

The fourth proportional to 1,110.02, 1,665.02 and 561.80 is: 842.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.02 : 1,665.02 = 561.80 : x
  2. Step 2: Convert to fraction form
    1,110.02/1,665.02 = 561.80/x
  3. Step 3: Cross multiply
    1,110.02x = 1,665.02 × 561.80
  4. Step 4: Simplify right side
    1,110.02x = 935,408.24
  5. Step 5: Solve for x
    x = 935,408.24/1,110.02
  6. Step 6: Final answer
    x = 842.69

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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.