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Finding the Fourth Proportional to 684,986.70, 961,080.90 and 684,986.70

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Solution

The fourth proportional to 684,986.70, 961,080.90 and 684,986.70 is: 961,080.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,986.70 : 961,080.90 = 684,986.70 : x
  2. Step 2: Convert to fraction form
    684,986.70/961,080.90 = 684,986.70/x
  3. Step 3: Cross multiply
    684,986.70x = 961,080.90 × 684,986.70
  4. Step 4: Simplify right side
    684,986.70x = 658,327,634,124.03
  5. Step 5: Solve for x
    x = 658,327,634,124.03/684,986.70
  6. Step 6: Final answer
    x = 961,080.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.