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Finding the Fourth Proportional to 564,622.78, 779,180.75 and 309,990.37

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Solution

The fourth proportional to 564,622.78, 779,180.75 and 309,990.37 is: 427,787.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    564,622.78 : 779,180.75 = 309,990.37 : x
  2. Step 2: Convert to fraction form
    564,622.78/779,180.75 = 309,990.37/x
  3. Step 3: Cross multiply
    564,622.78x = 779,180.75 × 309,990.37
  4. Step 4: Simplify right side
    564,622.78x = 241,538,527,439.43
  5. Step 5: Solve for x
    x = 241,538,527,439.43/564,622.78
  6. Step 6: Final answer
    x = 427,787.43

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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.