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Finding the Fourth Proportional to 978,863.19, 1,350,713.10 and 543,278.40

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Solution

The fourth proportional to 978,863.19, 1,350,713.10 and 543,278.40 is: 749,658.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,863.19 : 1,350,713.10 = 543,278.40 : x
  2. Step 2: Convert to fraction form
    978,863.19/1,350,713.10 = 543,278.40/x
  3. Step 3: Cross multiply
    978,863.19x = 1,350,713.10 × 543,278.40
  4. Step 4: Simplify right side
    978,863.19x = 733,813,251,827.04
  5. Step 5: Solve for x
    x = 733,813,251,827.04/978,863.19
  6. Step 6: Final answer
    x = 749,658.64

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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.