Home / 1,711.19-2,566.80-478.70

Finding the Fourth Proportional to 1,711.19, 2,566.80 and 478.70

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Solution

The fourth proportional to 1,711.19, 2,566.80 and 478.70 is: 718.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,711.19 : 2,566.80 = 478.70 : x
  2. Step 2: Convert to fraction form
    1,711.19/2,566.80 = 478.70/x
  3. Step 3: Cross multiply
    1,711.19x = 2,566.80 × 478.70
  4. Step 4: Simplify right side
    1,711.19x = 1,228,727.16
  5. Step 5: Solve for x
    x = 1,228,727.16/1,711.19
  6. Step 6: Final answer
    x = 718.05

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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.