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Finding the Fourth Proportional to 268,656.40, 403,276.20 and 209,753.20

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Solution

The fourth proportional to 268,656.40, 403,276.20 and 209,753.20 is: 314,857.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,656.40 : 403,276.20 = 209,753.20 : x
  2. Step 2: Convert to fraction form
    268,656.40/403,276.20 = 209,753.20/x
  3. Step 3: Cross multiply
    268,656.40x = 403,276.20 × 209,753.20
  4. Step 4: Simplify right side
    268,656.40x = 84,588,473,433.84
  5. Step 5: Solve for x
    x = 84,588,473,433.84/268,656.40
  6. Step 6: Final answer
    x = 314,857.47

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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.