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Finding the Fourth Proportional to 961,405.80, 1,440,207.90 and 843,210.60

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Solution

The fourth proportional to 961,405.80, 1,440,207.90 and 843,210.60 is: 1,263,148.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    961,405.80 : 1,440,207.90 = 843,210.60 : x
  2. Step 2: Convert to fraction form
    961,405.80/1,440,207.90 = 843,210.60/x
  3. Step 3: Cross multiply
    961,405.80x = 1,440,207.90 × 843,210.60
  4. Step 4: Simplify right side
    961,405.80x = 1,214,398,567,483.74
  5. Step 5: Solve for x
    x = 1,214,398,567,483.74/961,405.80
  6. Step 6: Final answer
    x = 1,263,148.78

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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.