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Finding the Fourth Proportional to 840,286.64, 1,255,072 and 760,201.13

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Solution

The fourth proportional to 840,286.64, 1,255,072 and 760,201.13 is: 1,135,454.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,286.64 : 1,255,072 = 760,201.13 : x
  2. Step 2: Convert to fraction form
    840,286.64/1,255,072 = 760,201.13/x
  3. Step 3: Cross multiply
    840,286.64x = 1,255,072 × 760,201.13
  4. Step 4: Simplify right side
    840,286.64x = 954,107,146,356
  5. Step 5: Solve for x
    x = 954,107,146,356/840,286.64
  6. Step 6: Final answer
    x = 1,135,454.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.