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Finding the Fourth Proportional to 620,103.66, 855,836.73 and 378,527.10

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Solution

The fourth proportional to 620,103.66, 855,836.73 and 378,527.10 is: 522,424.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,103.66 : 855,836.73 = 378,527.10 : x
  2. Step 2: Convert to fraction form
    620,103.66/855,836.73 = 378,527.10/x
  3. Step 3: Cross multiply
    620,103.66x = 855,836.73 × 378,527.10
  4. Step 4: Simplify right side
    620,103.66x = 323,957,395,480.38
  5. Step 5: Solve for x
    x = 323,957,395,480.38/620,103.66
  6. Step 6: Final answer
    x = 522,424.58

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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.