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Finding the Fourth Proportional to 1,308.44, 1,805.59 and 710.91

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Solution

The fourth proportional to 1,308.44, 1,805.59 and 710.91 is: 981.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.44 : 1,805.59 = 710.91 : x
  2. Step 2: Convert to fraction form
    1,308.44/1,805.59 = 710.91/x
  3. Step 3: Cross multiply
    1,308.44x = 1,805.59 × 710.91
  4. Step 4: Simplify right side
    1,308.44x = 1,283,611.99
  5. Step 5: Solve for x
    x = 1,283,611.99/1,308.44
  6. Step 6: Final answer
    x = 981.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.