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Finding the Fourth Proportional to 353,242.27, 487,302.87 and 209,900.80

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Solution

The fourth proportional to 353,242.27, 487,302.87 and 209,900.80 is: 289,561.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,242.27 : 487,302.87 = 209,900.80 : x
  2. Step 2: Convert to fraction form
    353,242.27/487,302.87 = 209,900.80/x
  3. Step 3: Cross multiply
    353,242.27x = 487,302.87 × 209,900.80
  4. Step 4: Simplify right side
    353,242.27x = 102,285,262,255.30
  5. Step 5: Solve for x
    x = 102,285,262,255.30/353,242.27
  6. Step 6: Final answer
    x = 289,561.22

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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.