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Finding the Fourth Proportional to 657,799.12, 907,761 and 355,993.12

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Solution

The fourth proportional to 657,799.12, 907,761 and 355,993.12 is: 491,269.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,799.12 : 907,761 = 355,993.12 : x
  2. Step 2: Convert to fraction form
    657,799.12/907,761 = 355,993.12/x
  3. Step 3: Cross multiply
    657,799.12x = 907,761 × 355,993.12
  4. Step 4: Simplify right side
    657,799.12x = 323,156,670,604.32
  5. Step 5: Solve for x
    x = 323,156,670,604.32/657,799.12
  6. Step 6: Final answer
    x = 491,269.54

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1.5x scale

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.