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Finding the Fourth Proportional to 687,016.26, 948,082.84 and 418,744.26

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Solution

The fourth proportional to 687,016.26, 948,082.84 and 418,744.26 is: 577,867.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,016.26 : 948,082.84 = 418,744.26 : x
  2. Step 2: Convert to fraction form
    687,016.26/948,082.84 = 418,744.26/x
  3. Step 3: Cross multiply
    687,016.26x = 948,082.84 × 418,744.26
  4. Step 4: Simplify right side
    687,016.26x = 397,004,247,254.50
  5. Step 5: Solve for x
    x = 397,004,247,254.50/687,016.26
  6. Step 6: Final answer
    x = 577,867.32

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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.