Home / 1,121,742.86-1,679,932.64-646,988.90

Finding the Fourth Proportional to 1,121,742.86, 1,679,932.64 and 646,988.90

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Solution

The fourth proportional to 1,121,742.86, 1,679,932.64 and 646,988.90 is: 968,936.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,742.86 : 1,679,932.64 = 646,988.90 : x
  2. Step 2: Convert to fraction form
    1,121,742.86/1,679,932.64 = 646,988.90/x
  3. Step 3: Cross multiply
    1,121,742.86x = 1,679,932.64 × 646,988.90
  4. Step 4: Simplify right side
    1,121,742.86x = 1,086,897,770,827.70
  5. Step 5: Solve for x
    x = 1,086,897,770,827.70/1,121,742.86
  6. Step 6: Final answer
    x = 968,936.65

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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.