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Finding the Fourth Proportional to 756.06, 1,043.41 and 419.98

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Solution

The fourth proportional to 756.06, 1,043.41 and 419.98 is: 579.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.06 : 1,043.41 = 419.98 : x
  2. Step 2: Convert to fraction form
    756.06/1,043.41 = 419.98/x
  3. Step 3: Cross multiply
    756.06x = 1,043.41 × 419.98
  4. Step 4: Simplify right side
    756.06x = 438,206.11
  5. Step 5: Solve for x
    x = 438,206.11/756.06
  6. Step 6: Final answer
    x = 579.60

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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.