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Finding the Fourth Proportional to 978,836.42, 1,351,373.38 and 616,570.80

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Solution

The fourth proportional to 978,836.42, 1,351,373.38 and 616,570.80 is: 851,232.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,836.42 : 1,351,373.38 = 616,570.80 : x
  2. Step 2: Convert to fraction form
    978,836.42/1,351,373.38 = 616,570.80/x
  3. Step 3: Cross multiply
    978,836.42x = 1,351,373.38 × 616,570.80
  4. Step 4: Simplify right side
    978,836.42x = 833,217,366,005.30
  5. Step 5: Solve for x
    x = 833,217,366,005.30/978,836.42
  6. Step 6: Final answer
    x = 851,232.49

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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.