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Finding the Fourth Proportional to 353,099.48, 487,295.07 and 217,140.98

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Solution

The fourth proportional to 353,099.48, 487,295.07 and 217,140.98 is: 299,665.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,099.48 : 487,295.07 = 217,140.98 : x
  2. Step 2: Convert to fraction form
    353,099.48/487,295.07 = 217,140.98/x
  3. Step 3: Cross multiply
    353,099.48x = 487,295.07 × 217,140.98
  4. Step 4: Simplify right side
    353,099.48x = 105,811,729,048.97
  5. Step 5: Solve for x
    x = 105,811,729,048.97/353,099.48
  6. Step 6: Final answer
    x = 299,665.49

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.