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Finding the Fourth Proportional to 911,806.80, 1,367,710.20 and 406,609.80

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Solution

The fourth proportional to 911,806.80, 1,367,710.20 and 406,609.80 is: 609,914.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,806.80 : 1,367,710.20 = 406,609.80 : x
  2. Step 2: Convert to fraction form
    911,806.80/1,367,710.20 = 406,609.80/x
  3. Step 3: Cross multiply
    911,806.80x = 1,367,710.20 × 406,609.80
  4. Step 4: Simplify right side
    911,806.80x = 556,124,370,879.96
  5. Step 5: Solve for x
    x = 556,124,370,879.96/911,806.80
  6. Step 6: Final answer
    x = 609,914.70

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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.