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Finding the Fourth Proportional to 485,714.21, 670,288.53 and 270,867.87

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Solution

The fourth proportional to 485,714.21, 670,288.53 and 270,867.87 is: 373,799.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,714.21 : 670,288.53 = 270,867.87 : x
  2. Step 2: Convert to fraction form
    485,714.21/670,288.53 = 270,867.87/x
  3. Step 3: Cross multiply
    485,714.21x = 670,288.53 × 270,867.87
  4. Step 4: Simplify right side
    485,714.21x = 181,559,626,406.53
  5. Step 5: Solve for x
    x = 181,559,626,406.53/485,714.21
  6. Step 6: Final answer
    x = 373,799.29

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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.