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Finding the Fourth Proportional to 606,878.70, 911,302.20 and 408,080.40

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Solution

The fourth proportional to 606,878.70, 911,302.20 and 408,080.40 is: 612,782.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,878.70 : 911,302.20 = 408,080.40 : x
  2. Step 2: Convert to fraction form
    606,878.70/911,302.20 = 408,080.40/x
  3. Step 3: Cross multiply
    606,878.70x = 911,302.20 × 408,080.40
  4. Step 4: Simplify right side
    606,878.70x = 371,884,566,296.88
  5. Step 5: Solve for x
    x = 371,884,566,296.88/606,878.70
  6. Step 6: Final answer
    x = 612,782.37

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1.5x scale

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.