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Finding the Fourth Proportional to 427,391.73, 640,521.32 and 227,281.23

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Solution

The fourth proportional to 427,391.73, 640,521.32 and 227,281.23 is: 340,620.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,391.73 : 640,521.32 = 227,281.23 : x
  2. Step 2: Convert to fraction form
    427,391.73/640,521.32 = 227,281.23/x
  3. Step 3: Cross multiply
    427,391.73x = 640,521.32 × 227,281.23
  4. Step 4: Simplify right side
    427,391.73x = 145,578,472,314.42
  5. Step 5: Solve for x
    x = 145,578,472,314.42/427,391.73
  6. Step 6: Final answer
    x = 340,620.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.