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Finding the Fourth Proportional to 1,486.61, 2,051.77 and 857.02

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Solution

The fourth proportional to 1,486.61, 2,051.77 and 857.02 is: 1,182.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,486.61 : 2,051.77 = 857.02 : x
  2. Step 2: Convert to fraction form
    1,486.61/2,051.77 = 857.02/x
  3. Step 3: Cross multiply
    1,486.61x = 2,051.77 × 857.02
  4. Step 4: Simplify right side
    1,486.61x = 1,758,400.65
  5. Step 5: Solve for x
    x = 1,758,400.65/1,486.61
  6. Step 6: Final answer
    x = 1,182.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.