Home / 1,121,739.86-1,679,928.15-646,985.90

Finding the Fourth Proportional to 1,121,739.86, 1,679,928.15 and 646,985.90

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Solution

The fourth proportional to 1,121,739.86, 1,679,928.15 and 646,985.90 is: 968,932.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,739.86 : 1,679,928.15 = 646,985.90 : x
  2. Step 2: Convert to fraction form
    1,121,739.86/1,679,928.15 = 646,985.90/x
  3. Step 3: Cross multiply
    1,121,739.86x = 1,679,928.15 × 646,985.90
  4. Step 4: Simplify right side
    1,121,739.86x = 1,086,889,826,063.09
  5. Step 5: Solve for x
    x = 1,086,889,826,063.09/1,121,739.86
  6. Step 6: Final answer
    x = 968,932.16

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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.