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Finding the Fourth Proportional to 426,104.20, 638,864.70 and 201,572.20

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Solution

The fourth proportional to 426,104.20, 638,864.70 and 201,572.20 is: 302,220.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,104.20 : 638,864.70 = 201,572.20 : x
  2. Step 2: Convert to fraction form
    426,104.20/638,864.70 = 201,572.20/x
  3. Step 3: Cross multiply
    426,104.20x = 638,864.70 × 201,572.20
  4. Step 4: Simplify right side
    426,104.20x = 128,777,363,081.34
  5. Step 5: Solve for x
    x = 128,777,363,081.34/426,104.20
  6. Step 6: Final answer
    x = 302,220.36

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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.