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Finding the Fourth Proportional to 463,938.92, 640,205.39 and 272,915.40

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Solution

The fourth proportional to 463,938.92, 640,205.39 and 272,915.40 is: 376,605.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    463,938.92 : 640,205.39 = 272,915.40 : x
  2. Step 2: Convert to fraction form
    463,938.92/640,205.39 = 272,915.40/x
  3. Step 3: Cross multiply
    463,938.92x = 640,205.39 × 272,915.40
  4. Step 4: Simplify right side
    463,938.92x = 174,721,908,729.43
  5. Step 5: Solve for x
    x = 174,721,908,729.43/463,938.92
  6. Step 6: Final answer
    x = 376,605.42

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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.