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Finding the Fourth Proportional to 1,799,123.38, 2,699,430.99 and 787,723.30

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Solution

The fourth proportional to 1,799,123.38, 2,699,430.99 and 787,723.30 is: 1,181,911.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,799,123.38 : 2,699,430.99 = 787,723.30 : x
  2. Step 2: Convert to fraction form
    1,799,123.38/2,699,430.99 = 787,723.30/x
  3. Step 3: Cross multiply
    1,799,123.38x = 2,699,430.99 × 787,723.30
  4. Step 4: Simplify right side
    1,799,123.38x = 2,126,404,687,565.07
  5. Step 5: Solve for x
    x = 2,126,404,687,565.07/1,799,123.38
  6. Step 6: Final answer
    x = 1,181,911.54

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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.