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Finding the Fourth Proportional to 865,687.44, 1,298,670.69 and 266,648.32

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Solution

The fourth proportional to 865,687.44, 1,298,670.69 and 266,648.32 is: 400,015.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,687.44 : 1,298,670.69 = 266,648.32 : x
  2. Step 2: Convert to fraction form
    865,687.44/1,298,670.69 = 266,648.32/x
  3. Step 3: Cross multiply
    865,687.44x = 1,298,670.69 × 266,648.32
  4. Step 4: Simplify right side
    865,687.44x = 346,288,360,345.01
  5. Step 5: Solve for x
    x = 346,288,360,345.01/865,687.44
  6. Step 6: Final answer
    x = 400,015.46

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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.