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Finding the Fourth Proportional to 978,387.80, 1,465,767.30 and 556,410.20

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Solution

The fourth proportional to 978,387.80, 1,465,767.30 and 556,410.20 is: 833,583.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,387.80 : 1,465,767.30 = 556,410.20 : x
  2. Step 2: Convert to fraction form
    978,387.80/1,465,767.30 = 556,410.20/x
  3. Step 3: Cross multiply
    978,387.80x = 1,465,767.30 × 556,410.20
  4. Step 4: Simplify right side
    978,387.80x = 815,567,876,546.46
  5. Step 5: Solve for x
    x = 815,567,876,546.46/978,387.80
  6. Step 6: Final answer
    x = 833,583.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.