Home / 1,139,378.40-1,707,998.40-429,883.20

Finding the Fourth Proportional to 1,139,378.40, 1,707,998.40 and 429,883.20

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Solution

The fourth proportional to 1,139,378.40, 1,707,998.40 and 429,883.20 is: 644,421.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139,378.40 : 1,707,998.40 = 429,883.20 : x
  2. Step 2: Convert to fraction form
    1,139,378.40/1,707,998.40 = 429,883.20/x
  3. Step 3: Cross multiply
    1,139,378.40x = 1,707,998.40 × 429,883.20
  4. Step 4: Simplify right side
    1,139,378.40x = 734,239,817,786.88
  5. Step 5: Solve for x
    x = 734,239,817,786.88/1,139,378.40
  6. Step 6: Final answer
    x = 644,421.39

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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.