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Finding the Fourth Proportional to 272,485.80, 408,728.70 and 209,427.30

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Solution

The fourth proportional to 272,485.80, 408,728.70 and 209,427.30 is: 314,140.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,485.80 : 408,728.70 = 209,427.30 : x
  2. Step 2: Convert to fraction form
    272,485.80/408,728.70 = 209,427.30/x
  3. Step 3: Cross multiply
    272,485.80x = 408,728.70 × 209,427.30
  4. Step 4: Simplify right side
    272,485.80x = 85,598,948,073.51
  5. Step 5: Solve for x
    x = 85,598,948,073.51/272,485.80
  6. Step 6: Final answer
    x = 314,140.95

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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.