Home / 810,080.80-1,213,663.20-642,702.40

Finding the Fourth Proportional to 810,080.80, 1,213,663.20 and 642,702.40

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Solution

The fourth proportional to 810,080.80, 1,213,663.20 and 642,702.40 is: 962,896.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,080.80 : 1,213,663.20 = 642,702.40 : x
  2. Step 2: Convert to fraction form
    810,080.80/1,213,663.20 = 642,702.40/x
  3. Step 3: Cross multiply
    810,080.80x = 1,213,663.20 × 642,702.40
  4. Step 4: Simplify right side
    810,080.80x = 780,024,251,431.68
  5. Step 5: Solve for x
    x = 780,024,251,431.68/810,080.80
  6. Step 6: Final answer
    x = 962,896.85

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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.