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Finding the Fourth Proportional to 761.38, 1,050.70 and 412.06

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Solution

The fourth proportional to 761.38, 1,050.70 and 412.06 is: 568.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.38 : 1,050.70 = 412.06 : x
  2. Step 2: Convert to fraction form
    761.38/1,050.70 = 412.06/x
  3. Step 3: Cross multiply
    761.38x = 1,050.70 × 412.06
  4. Step 4: Simplify right side
    761.38x = 432,951.44
  5. Step 5: Solve for x
    x = 432,951.44/761.38
  6. Step 6: Final answer
    x = 568.64

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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.