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Finding the Fourth Proportional to 1,785.13, 2,677.73 and 486.63

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Solution

The fourth proportional to 1,785.13, 2,677.73 and 486.63 is: 729.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,785.13 : 2,677.73 = 486.63 : x
  2. Step 2: Convert to fraction form
    1,785.13/2,677.73 = 486.63/x
  3. Step 3: Cross multiply
    1,785.13x = 2,677.73 × 486.63
  4. Step 4: Simplify right side
    1,785.13x = 1,303,061.32
  5. Step 5: Solve for x
    x = 1,303,061.32/1,785.13
  6. Step 6: Final answer
    x = 729.96

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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.