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Finding the Fourth Proportional to 811,901.76, 1,217,969.28 and 250,980

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Solution

The fourth proportional to 811,901.76, 1,217,969.28 and 250,980 is: 376,506.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,901.76 : 1,217,969.28 = 250,980 : x
  2. Step 2: Convert to fraction form
    811,901.76/1,217,969.28 = 250,980/x
  3. Step 3: Cross multiply
    811,901.76x = 1,217,969.28 × 250,980
  4. Step 4: Simplify right side
    811,901.76x = 305,685,929,894.40
  5. Step 5: Solve for x
    x = 305,685,929,894.40/811,901.76
  6. Step 6: Final answer
    x = 376,506.06

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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.