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Finding the Fourth Proportional to 652,278.80, 978,418.20 and 628,659.20

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Solution

The fourth proportional to 652,278.80, 978,418.20 and 628,659.20 is: 942,988.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,278.80 : 978,418.20 = 628,659.20 : x
  2. Step 2: Convert to fraction form
    652,278.80/978,418.20 = 628,659.20/x
  3. Step 3: Cross multiply
    652,278.80x = 978,418.20 × 628,659.20
  4. Step 4: Simplify right side
    652,278.80x = 615,091,602,877.44
  5. Step 5: Solve for x
    x = 615,091,602,877.44/652,278.80
  6. Step 6: Final answer
    x = 942,988.80

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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.