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Finding the Fourth Proportional to 978,236.62, 1,349,966.57 and 548,516.78

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Solution

The fourth proportional to 978,236.62, 1,349,966.57 and 548,516.78 is: 756,953.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,236.62 : 1,349,966.57 = 548,516.78 : x
  2. Step 2: Convert to fraction form
    978,236.62/1,349,966.57 = 548,516.78/x
  3. Step 3: Cross multiply
    978,236.62x = 1,349,966.57 × 548,516.78
  4. Step 4: Simplify right side
    978,236.62x = 740,479,316,084.05
  5. Step 5: Solve for x
    x = 740,479,316,084.05/978,236.62
  6. Step 6: Final answer
    x = 756,953.18

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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.