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Finding the Fourth Proportional to 426,787.08, 640,223.71 and 138,586.67

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Solution

The fourth proportional to 426,787.08, 640,223.71 and 138,586.67 is: 207,894.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,787.08 : 640,223.71 = 138,586.67 : x
  2. Step 2: Convert to fraction form
    426,787.08/640,223.71 = 138,586.67/x
  3. Step 3: Cross multiply
    426,787.08x = 640,223.71 × 138,586.67
  4. Step 4: Simplify right side
    426,787.08x = 88,726,471,396.90
  5. Step 5: Solve for x
    x = 88,726,471,396.90/426,787.08
  6. Step 6: Final answer
    x = 207,894.00

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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.