Home / 1,287,140.80-1,769,955.60-1,117,079.68

Finding the Fourth Proportional to 1,287,140.80, 1,769,955.60 and 1,117,079.68

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Solution

The fourth proportional to 1,287,140.80, 1,769,955.60 and 1,117,079.68 is: 1,536,103.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,140.80 : 1,769,955.60 = 1,117,079.68 : x
  2. Step 2: Convert to fraction form
    1,287,140.80/1,769,955.60 = 1,117,079.68/x
  3. Step 3: Cross multiply
    1,287,140.80x = 1,769,955.60 × 1,117,079.68
  4. Step 4: Simplify right side
    1,287,140.80x = 1,977,181,435,262.21
  5. Step 5: Solve for x
    x = 1,977,181,435,262.21/1,287,140.80
  6. Step 6: Final answer
    x = 1,536,103.46

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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.