Home / 1,433,520.38-1,978,221.80-780,118.63

Finding the Fourth Proportional to 1,433,520.38, 1,978,221.80 and 780,118.63

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Solution

The fourth proportional to 1,433,520.38, 1,978,221.80 and 780,118.63 is: 1,076,543.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,433,520.38 : 1,978,221.80 = 780,118.63 : x
  2. Step 2: Convert to fraction form
    1,433,520.38/1,978,221.80 = 780,118.63/x
  3. Step 3: Cross multiply
    1,433,520.38x = 1,978,221.80 × 780,118.63
  4. Step 4: Simplify right side
    1,433,520.38x = 1,543,247,666,660.43
  5. Step 5: Solve for x
    x = 1,543,247,666,660.43/1,433,520.38
  6. Step 6: Final answer
    x = 1,076,543.93

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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.