Home / 1,215,211.20-1,819,317.60-742,819.20

Finding the Fourth Proportional to 1,215,211.20, 1,819,317.60 and 742,819.20

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Solution

The fourth proportional to 1,215,211.20, 1,819,317.60 and 742,819.20 is: 1,112,089.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,211.20 : 1,819,317.60 = 742,819.20 : x
  2. Step 2: Convert to fraction form
    1,215,211.20/1,819,317.60 = 742,819.20/x
  3. Step 3: Cross multiply
    1,215,211.20x = 1,819,317.60 × 742,819.20
  4. Step 4: Simplify right side
    1,215,211.20x = 1,351,424,044,177.92
  5. Step 5: Solve for x
    x = 1,351,424,044,177.92/1,215,211.20
  6. Step 6: Final answer
    x = 1,112,089.85

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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.