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Finding the Fourth Proportional to 1,309.91, 1,807.77 and 750.56

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Solution

The fourth proportional to 1,309.91, 1,807.77 and 750.56 is: 1,035.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.91 : 1,807.77 = 750.56 : x
  2. Step 2: Convert to fraction form
    1,309.91/1,807.77 = 750.56/x
  3. Step 3: Cross multiply
    1,309.91x = 1,807.77 × 750.56
  4. Step 4: Simplify right side
    1,309.91x = 1,356,830.81
  5. Step 5: Solve for x
    x = 1,356,830.81/1,309.91
  6. Step 6: Final answer
    x = 1,035.82

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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.