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Finding the Fourth Proportional to 427,363.17, 640,862.51 and 127,838.94

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Solution

The fourth proportional to 427,363.17, 640,862.51 and 127,838.94 is: 191,703.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,363.17 : 640,862.51 = 127,838.94 : x
  2. Step 2: Convert to fraction form
    427,363.17/640,862.51 = 127,838.94/x
  3. Step 3: Cross multiply
    427,363.17x = 640,862.51 × 127,838.94
  4. Step 4: Simplify right side
    427,363.17x = 81,927,183,324.94
  5. Step 5: Solve for x
    x = 81,927,183,324.94/427,363.17
  6. Step 6: Final answer
    x = 191,703.89

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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.