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Finding the Fourth Proportional to 2,991,890.40, 4,487,835.69 and 748,028.40

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Solution

The fourth proportional to 2,991,890.40, 4,487,835.69 and 748,028.40 is: 1,122,042.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991,890.40 : 4,487,835.69 = 748,028.40 : x
  2. Step 2: Convert to fraction form
    2,991,890.40/4,487,835.69 = 748,028.40/x
  3. Step 3: Cross multiply
    2,991,890.40x = 4,487,835.69 × 748,028.40
  4. Step 4: Simplify right side
    2,991,890.40x = 3,357,028,533,824.21
  5. Step 5: Solve for x
    x = 3,357,028,533,824.21/2,991,890.40
  6. Step 6: Final answer
    x = 1,122,042.62

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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.