Home / 1,317,861.80-1,976,331.90-686,565.80

Finding the Fourth Proportional to 1,317,861.80, 1,976,331.90 and 686,565.80

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Solution

The fourth proportional to 1,317,861.80, 1,976,331.90 and 686,565.80 is: 1,029,608.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317,861.80 : 1,976,331.90 = 686,565.80 : x
  2. Step 2: Convert to fraction form
    1,317,861.80/1,976,331.90 = 686,565.80/x
  3. Step 3: Cross multiply
    1,317,861.80x = 1,976,331.90 × 686,565.80
  4. Step 4: Simplify right side
    1,317,861.80x = 1,356,881,891,989.02
  5. Step 5: Solve for x
    x = 1,356,881,891,989.02/1,317,861.80
  6. Step 6: Final answer
    x = 1,029,608.64

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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.