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Finding the Fourth Proportional to 310,491.08, 428,227.08 and 208,485.80

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Solution

The fourth proportional to 310,491.08, 428,227.08 and 208,485.80 is: 287,542.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,491.08 : 428,227.08 = 208,485.80 : x
  2. Step 2: Convert to fraction form
    310,491.08/428,227.08 = 208,485.80/x
  3. Step 3: Cross multiply
    310,491.08x = 428,227.08 × 208,485.80
  4. Step 4: Simplify right side
    310,491.08x = 89,279,265,355.46
  5. Step 5: Solve for x
    x = 89,279,265,355.46/310,491.08
  6. Step 6: Final answer
    x = 287,542.13

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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.