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Finding the Fourth Proportional to 1,878.17, 2,814.16 and 644.90

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Solution

The fourth proportional to 1,878.17, 2,814.16 and 644.90 is: 966.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,878.17 : 2,814.16 = 644.90 : x
  2. Step 2: Convert to fraction form
    1,878.17/2,814.16 = 644.90/x
  3. Step 3: Cross multiply
    1,878.17x = 2,814.16 × 644.90
  4. Step 4: Simplify right side
    1,878.17x = 1,814,853.14
  5. Step 5: Solve for x
    x = 1,814,853.14/1,878.17
  6. Step 6: Final answer
    x = 966.29

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1.5x scale

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.