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Finding the Fourth Proportional to 438,503.40, 657,560.70 and 201,724.20

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Solution

The fourth proportional to 438,503.40, 657,560.70 and 201,724.20 is: 302,496.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,503.40 : 657,560.70 = 201,724.20 : x
  2. Step 2: Convert to fraction form
    438,503.40/657,560.70 = 201,724.20/x
  3. Step 3: Cross multiply
    438,503.40x = 657,560.70 × 201,724.20
  4. Step 4: Simplify right side
    438,503.40x = 132,645,906,158.94
  5. Step 5: Solve for x
    x = 132,645,906,158.94/438,503.40
  6. Step 6: Final answer
    x = 302,496.87

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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.