Home / 810,079.80-1,213,661.70-642,701.40

Finding the Fourth Proportional to 810,079.80, 1,213,661.70 and 642,701.40

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Solution

The fourth proportional to 810,079.80, 1,213,661.70 and 642,701.40 is: 962,895.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,079.80 : 1,213,661.70 = 642,701.40 : x
  2. Step 2: Convert to fraction form
    810,079.80/1,213,661.70 = 642,701.40/x
  3. Step 3: Cross multiply
    810,079.80x = 1,213,661.70 × 642,701.40
  4. Step 4: Simplify right side
    810,079.80x = 780,022,073,716.38
  5. Step 5: Solve for x
    x = 780,022,073,716.38/810,079.80
  6. Step 6: Final answer
    x = 962,895.35

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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.