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Finding the Fourth Proportional to 1,711.36, 2,566.99 and 478.86

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Solution

The fourth proportional to 1,711.36, 2,566.99 and 478.86 is: 718.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,711.36 : 2,566.99 = 478.86 : x
  2. Step 2: Convert to fraction form
    1,711.36/2,566.99 = 478.86/x
  3. Step 3: Cross multiply
    1,711.36x = 2,566.99 × 478.86
  4. Step 4: Simplify right side
    1,711.36x = 1,229,228.83
  5. Step 5: Solve for x
    x = 1,229,228.83/1,711.36
  6. Step 6: Final answer
    x = 718.28

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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.