Home / 1,438,387.20-1,985,020.68-818,176.32

Finding the Fourth Proportional to 1,438,387.20, 1,985,020.68 and 818,176.32

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Solution

The fourth proportional to 1,438,387.20, 1,985,020.68 and 818,176.32 is: 1,129,109.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438,387.20 : 1,985,020.68 = 818,176.32 : x
  2. Step 2: Convert to fraction form
    1,438,387.20/1,985,020.68 = 818,176.32/x
  3. Step 3: Cross multiply
    1,438,387.20x = 1,985,020.68 × 818,176.32
  4. Step 4: Simplify right side
    1,438,387.20x = 1,624,096,915,086.30
  5. Step 5: Solve for x
    x = 1,624,096,915,086.30/1,438,387.20
  6. Step 6: Final answer
    x = 1,129,109.68

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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.