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Finding the Fourth Proportional to 1,187.26, 1,780.83 and 493.75

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Solution

The fourth proportional to 1,187.26, 1,780.83 and 493.75 is: 740.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187.26 : 1,780.83 = 493.75 : x
  2. Step 2: Convert to fraction form
    1,187.26/1,780.83 = 493.75/x
  3. Step 3: Cross multiply
    1,187.26x = 1,780.83 × 493.75
  4. Step 4: Simplify right side
    1,187.26x = 879,284.81
  5. Step 5: Solve for x
    x = 879,284.81/1,187.26
  6. Step 6: Final answer
    x = 740.60

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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.