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Finding the Fourth Proportional to 684,990.45, 961,086.15 and 684,990.45

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Solution

The fourth proportional to 684,990.45, 961,086.15 and 684,990.45 is: 961,086.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,990.45 : 961,086.15 = 684,990.45 : x
  2. Step 2: Convert to fraction form
    684,990.45/961,086.15 = 684,990.45/x
  3. Step 3: Cross multiply
    684,990.45x = 961,086.15 × 684,990.45
  4. Step 4: Simplify right side
    684,990.45x = 658,334,834,377.27
  5. Step 5: Solve for x
    x = 658,334,834,377.27/684,990.45
  6. Step 6: Final answer
    x = 961,086.15

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1.5x scale

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.