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Finding the Fourth Proportional to 620,218.35, 856,034.73 and 378,449.15

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Solution

The fourth proportional to 620,218.35, 856,034.73 and 378,449.15 is: 522,341.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,218.35 : 856,034.73 = 378,449.15 : x
  2. Step 2: Convert to fraction form
    620,218.35/856,034.73 = 378,449.15/x
  3. Step 3: Cross multiply
    620,218.35x = 856,034.73 × 378,449.15
  4. Step 4: Simplify right side
    620,218.35x = 323,965,611,658.81
  5. Step 5: Solve for x
    x = 323,965,611,658.81/620,218.35
  6. Step 6: Final answer
    x = 522,341.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.