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Finding the Fourth Proportional to 1,909.71, 2,864.17 and 677.16

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Solution

The fourth proportional to 1,909.71, 2,864.17 and 677.16 is: 1,015.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.71 : 2,864.17 = 677.16 : x
  2. Step 2: Convert to fraction form
    1,909.71/2,864.17 = 677.16/x
  3. Step 3: Cross multiply
    1,909.71x = 2,864.17 × 677.16
  4. Step 4: Simplify right side
    1,909.71x = 1,939,501.36
  5. Step 5: Solve for x
    x = 1,939,501.36/1,909.71
  6. Step 6: Final answer
    x = 1,015.60

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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.