Home / 991,863.66-1,367,504.70-642,386.60

Finding the Fourth Proportional to 991,863.66, 1,367,504.70 and 642,386.60

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Solution

The fourth proportional to 991,863.66, 1,367,504.70 and 642,386.60 is: 885,672.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,863.66 : 1,367,504.70 = 642,386.60 : x
  2. Step 2: Convert to fraction form
    991,863.66/1,367,504.70 = 642,386.60/x
  3. Step 3: Cross multiply
    991,863.66x = 1,367,504.70 × 642,386.60
  4. Step 4: Simplify right side
    991,863.66x = 878,466,692,405.40
  5. Step 5: Solve for x
    x = 878,466,692,405.40/991,863.66
  6. Step 6: Final answer
    x = 885,672.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.