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Finding the Fourth Proportional to 869,138.40, 1,302,152.40 and 744,722.40

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Solution

The fourth proportional to 869,138.40, 1,302,152.40 and 744,722.40 is: 1,115,751.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,138.40 : 1,302,152.40 = 744,722.40 : x
  2. Step 2: Convert to fraction form
    869,138.40/1,302,152.40 = 744,722.40/x
  3. Step 3: Cross multiply
    869,138.40x = 1,302,152.40 × 744,722.40
  4. Step 4: Simplify right side
    869,138.40x = 969,742,060,493.76
  5. Step 5: Solve for x
    x = 969,742,060,493.76/869,138.40
  6. Step 6: Final answer
    x = 1,115,751.02

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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.