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Finding the Fourth Proportional to 657,721.50, 907,656.48 and 355,915.50

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Solution

The fourth proportional to 657,721.50, 907,656.48 and 355,915.50 is: 491,163.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,721.50 : 907,656.48 = 355,915.50 : x
  2. Step 2: Convert to fraction form
    657,721.50/907,656.48 = 355,915.50/x
  3. Step 3: Cross multiply
    657,721.50x = 907,656.48 × 355,915.50
  4. Step 4: Simplify right side
    657,721.50x = 323,049,009,907.44
  5. Step 5: Solve for x
    x = 323,049,009,907.44/657,721.50
  6. Step 6: Final answer
    x = 491,163.83

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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.