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Finding the Fourth Proportional to 620,143.07, 855,930.71 and 378,373.73

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Solution

The fourth proportional to 620,143.07, 855,930.71 and 378,373.73 is: 522,237.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,143.07 : 855,930.71 = 378,373.73 : x
  2. Step 2: Convert to fraction form
    620,143.07/855,930.71 = 378,373.73/x
  3. Step 3: Cross multiply
    620,143.07x = 855,930.71 × 378,373.73
  4. Step 4: Simplify right side
    620,143.07x = 323,861,692,030.53
  5. Step 5: Solve for x
    x = 323,861,692,030.53/620,143.07
  6. Step 6: Final answer
    x = 522,237.06

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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.