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Finding the Fourth Proportional to 606,811.20, 911,200.95 and 408,012.90

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Solution

The fourth proportional to 606,811.20, 911,200.95 and 408,012.90 is: 612,681.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,811.20 : 911,200.95 = 408,012.90 : x
  2. Step 2: Convert to fraction form
    606,811.20/911,200.95 = 408,012.90/x
  3. Step 3: Cross multiply
    606,811.20x = 911,200.95 × 408,012.90
  4. Step 4: Simplify right side
    606,811.20x = 371,781,742,092.26
  5. Step 5: Solve for x
    x = 371,781,742,092.26/606,811.20
  6. Step 6: Final answer
    x = 612,681.08

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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.