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Finding the Fourth Proportional to 660,868.68, 991,745.93 and 424,377.44

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Solution

The fourth proportional to 660,868.68, 991,745.93 and 424,377.44 is: 636,850.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,868.68 : 991,745.93 = 424,377.44 : x
  2. Step 2: Convert to fraction form
    660,868.68/991,745.93 = 424,377.44/x
  3. Step 3: Cross multiply
    660,868.68x = 991,745.93 × 424,377.44
  4. Step 4: Simplify right side
    660,868.68x = 420,874,598,903.82
  5. Step 5: Solve for x
    x = 420,874,598,903.82/660,868.68
  6. Step 6: Final answer
    x = 636,850.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.