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Finding the Fourth Proportional to 750.74, 1,035.84 and 451.90

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Solution

The fourth proportional to 750.74, 1,035.84 and 451.90 is: 623.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.74 : 1,035.84 = 451.90 : x
  2. Step 2: Convert to fraction form
    750.74/1,035.84 = 451.90/x
  3. Step 3: Cross multiply
    750.74x = 1,035.84 × 451.90
  4. Step 4: Simplify right side
    750.74x = 468,093.51
  5. Step 5: Solve for x
    x = 468,093.51/750.74
  6. Step 6: Final answer
    x = 623.51

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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.