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Finding the Fourth Proportional to 425,512.40, 637,426.20 and 275,856.80

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Solution

The fourth proportional to 425,512.40, 637,426.20 and 275,856.80 is: 413,239.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,512.40 : 637,426.20 = 275,856.80 : x
  2. Step 2: Convert to fraction form
    425,512.40/637,426.20 = 275,856.80/x
  3. Step 3: Cross multiply
    425,512.40x = 637,426.20 × 275,856.80
  4. Step 4: Simplify right side
    425,512.40x = 175,838,351,768.16
  5. Step 5: Solve for x
    x = 175,838,351,768.16/425,512.40
  6. Step 6: Final answer
    x = 413,239.08

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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.