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Finding the Fourth Proportional to 309,775.32, 427,463.73 and 173,790.90

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Solution

The fourth proportional to 309,775.32, 427,463.73 and 173,790.90 is: 239,816.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,775.32 : 427,463.73 = 173,790.90 : x
  2. Step 2: Convert to fraction form
    309,775.32/427,463.73 = 173,790.90/x
  3. Step 3: Cross multiply
    309,775.32x = 427,463.73 × 173,790.90
  4. Step 4: Simplify right side
    309,775.32x = 74,289,306,354.06
  5. Step 5: Solve for x
    x = 74,289,306,354.06/309,775.32
  6. Step 6: Final answer
    x = 239,816.74

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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.