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Finding the Fourth Proportional to 750.66, 1,035.94 and 419.17

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Solution

The fourth proportional to 750.66, 1,035.94 and 419.17 is: 578.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.66 : 1,035.94 = 419.17 : x
  2. Step 2: Convert to fraction form
    750.66/1,035.94 = 419.17/x
  3. Step 3: Cross multiply
    750.66x = 1,035.94 × 419.17
  4. Step 4: Simplify right side
    750.66x = 434,234.97
  5. Step 5: Solve for x
    x = 434,234.97/750.66
  6. Step 6: Final answer
    x = 578.47

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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.