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Finding the Fourth Proportional to 657,871.80, 907,863 and 356,065.80

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Solution

The fourth proportional to 657,871.80, 907,863 and 356,065.80 is: 491,370.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,871.80 : 907,863 = 356,065.80 : x
  2. Step 2: Convert to fraction form
    657,871.80/907,863 = 356,065.80/x
  3. Step 3: Cross multiply
    657,871.80x = 907,863 × 356,065.80
  4. Step 4: Simplify right side
    657,871.80x = 323,258,965,385.40
  5. Step 5: Solve for x
    x = 323,258,965,385.40/657,871.80
  6. Step 6: Final answer
    x = 491,370.76

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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.