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Finding the Fourth Proportional to 1,388.49, 2,080.93 and 565.81

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Solution

The fourth proportional to 1,388.49, 2,080.93 and 565.81 is: 847.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.49 : 2,080.93 = 565.81 : x
  2. Step 2: Convert to fraction form
    1,388.49/2,080.93 = 565.81/x
  3. Step 3: Cross multiply
    1,388.49x = 2,080.93 × 565.81
  4. Step 4: Simplify right side
    1,388.49x = 1,177,411.00
  5. Step 5: Solve for x
    x = 1,177,411.00/1,388.49
  6. Step 6: Final answer
    x = 847.98

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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.