Home / 800,439.60-1,200,838.50-421,538.70

Finding the Fourth Proportional to 800,439.60, 1,200,838.50 and 421,538.70

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Solution

The fourth proportional to 800,439.60, 1,200,838.50 and 421,538.70 is: 632,402.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,439.60 : 1,200,838.50 = 421,538.70 : x
  2. Step 2: Convert to fraction form
    800,439.60/1,200,838.50 = 421,538.70/x
  3. Step 3: Cross multiply
    800,439.60x = 1,200,838.50 × 421,538.70
  4. Step 4: Simplify right side
    800,439.60x = 506,199,900,199.95
  5. Step 5: Solve for x
    x = 506,199,900,199.95/800,439.60
  6. Step 6: Final answer
    x = 632,402.37

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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.