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Finding the Fourth Proportional to 978,069.36, 1,349,800.56 and 548,377.20

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Solution

The fourth proportional to 978,069.36, 1,349,800.56 and 548,377.20 is: 756,796.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,069.36 : 1,349,800.56 = 548,377.20 : x
  2. Step 2: Convert to fraction form
    978,069.36/1,349,800.56 = 548,377.20/x
  3. Step 3: Cross multiply
    978,069.36x = 1,349,800.56 × 548,377.20
  4. Step 4: Simplify right side
    978,069.36x = 740,199,851,651.23
  5. Step 5: Solve for x
    x = 740,199,851,651.23/978,069.36
  6. Step 6: Final answer
    x = 756,796.89

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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.