Home / 1,392,221.10-1,921,353.91-780,374.02

Finding the Fourth Proportional to 1,392,221.10, 1,921,353.91 and 780,374.02

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Solution

The fourth proportional to 1,392,221.10, 1,921,353.91 and 780,374.02 is: 1,076,965.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,221.10 : 1,921,353.91 = 780,374.02 : x
  2. Step 2: Convert to fraction form
    1,392,221.10/1,921,353.91 = 780,374.02/x
  3. Step 3: Cross multiply
    1,392,221.10x = 1,921,353.91 × 780,374.02
  4. Step 4: Simplify right side
    1,392,221.10x = 1,499,374,674,589.42
  5. Step 5: Solve for x
    x = 1,499,374,674,589.42/1,392,221.10
  6. Step 6: Final answer
    x = 1,076,965.92

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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.