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Finding the Fourth Proportional to 1,309.76, 1,807.34 and 750.12

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Solution

The fourth proportional to 1,309.76, 1,807.34 and 750.12 is: 1,035.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.76 : 1,807.34 = 750.12 : x
  2. Step 2: Convert to fraction form
    1,309.76/1,807.34 = 750.12/x
  3. Step 3: Cross multiply
    1,309.76x = 1,807.34 × 750.12
  4. Step 4: Simplify right side
    1,309.76x = 1,355,721.88
  5. Step 5: Solve for x
    x = 1,355,721.88/1,309.76
  6. Step 6: Final answer
    x = 1,035.09

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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.