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Finding the Fourth Proportional to 911,734.95, 1,366,515.42 and 424,763.86

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Solution

The fourth proportional to 911,734.95, 1,366,515.42 and 424,763.86 is: 636,639.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,734.95 : 1,366,515.42 = 424,763.86 : x
  2. Step 2: Convert to fraction form
    911,734.95/1,366,515.42 = 424,763.86/x
  3. Step 3: Cross multiply
    911,734.95x = 1,366,515.42 × 424,763.86
  4. Step 4: Simplify right side
    911,734.95x = 580,446,364,548.72
  5. Step 5: Solve for x
    x = 580,446,364,548.72/911,734.95
  6. Step 6: Final answer
    x = 636,639.37

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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.