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Finding the Fourth Proportional to 253,049.21, 348,981.71 and 209,960.45

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Solution

The fourth proportional to 253,049.21, 348,981.71 and 209,960.45 is: 289,557.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,049.21 : 348,981.71 = 209,960.45 : x
  2. Step 2: Convert to fraction form
    253,049.21/348,981.71 = 209,960.45/x
  3. Step 3: Cross multiply
    253,049.21x = 348,981.71 × 209,960.45
  4. Step 4: Simplify right side
    253,049.21x = 73,272,355,823.57
  5. Step 5: Solve for x
    x = 73,272,355,823.57/253,049.21
  6. Step 6: Final answer
    x = 289,557.73

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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.