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Finding the Fourth Proportional to 687,338.98, 948,549.54 and 396,945.29

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Solution

The fourth proportional to 687,338.98, 948,549.54 and 396,945.29 is: 547,797.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,338.98 : 948,549.54 = 396,945.29 : x
  2. Step 2: Convert to fraction form
    687,338.98/948,549.54 = 396,945.29/x
  3. Step 3: Cross multiply
    687,338.98x = 948,549.54 × 396,945.29
  4. Step 4: Simplify right side
    687,338.98x = 376,522,265,507.19
  5. Step 5: Solve for x
    x = 376,522,265,507.19/687,338.98
  6. Step 6: Final answer
    x = 547,797.05

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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.