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Finding the Fourth Proportional to 308,492.64, 425,622.96 and 172,508.22

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Solution

The fourth proportional to 308,492.64, 425,622.96 and 172,508.22 is: 238,007.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,492.64 : 425,622.96 = 172,508.22 : x
  2. Step 2: Convert to fraction form
    308,492.64/425,622.96 = 172,508.22/x
  3. Step 3: Cross multiply
    308,492.64x = 425,622.96 × 172,508.22
  4. Step 4: Simplify right side
    308,492.64x = 73,423,459,220.73
  5. Step 5: Solve for x
    x = 73,423,459,220.73/308,492.64
  6. Step 6: Final answer
    x = 238,007.17

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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.