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Finding the Fourth Proportional to 817,697.70, 1,226,109.15 and 343,847.70

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Solution

The fourth proportional to 817,697.70, 1,226,109.15 and 343,847.70 is: 515,587.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,697.70 : 1,226,109.15 = 343,847.70 : x
  2. Step 2: Convert to fraction form
    817,697.70/1,226,109.15 = 343,847.70/x
  3. Step 3: Cross multiply
    817,697.70x = 1,226,109.15 × 343,847.70
  4. Step 4: Simplify right side
    817,697.70x = 421,594,811,176.46
  5. Step 5: Solve for x
    x = 421,594,811,176.46/817,697.70
  6. Step 6: Final answer
    x = 515,587.62

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1.5x scale

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.