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Finding the Fourth Proportional to 438,732.20, 657,660.90 and 201,661.40

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Solution

The fourth proportional to 438,732.20, 657,660.90 and 201,661.40 is: 302,291.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,732.20 : 657,660.90 = 201,661.40 : x
  2. Step 2: Convert to fraction form
    438,732.20/657,660.90 = 201,661.40/x
  3. Step 3: Cross multiply
    438,732.20x = 657,660.90 × 201,661.40
  4. Step 4: Simplify right side
    438,732.20x = 132,624,817,819.26
  5. Step 5: Solve for x
    x = 132,624,817,819.26/438,732.20
  6. Step 6: Final answer
    x = 302,291.05

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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.