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Finding the Fourth Proportional to 1,135.62, 1,703.61 and 486.36

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Solution

The fourth proportional to 1,135.62, 1,703.61 and 486.36 is: 729.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.62 : 1,703.61 = 486.36 : x
  2. Step 2: Convert to fraction form
    1,135.62/1,703.61 = 486.36/x
  3. Step 3: Cross multiply
    1,135.62x = 1,703.61 × 486.36
  4. Step 4: Simplify right side
    1,135.62x = 828,567.76
  5. Step 5: Solve for x
    x = 828,567.76/1,135.62
  6. Step 6: Final answer
    x = 729.62

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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.