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Finding the Fourth Proportional to 652,240.80, 978,361.20 and 628,621.20

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Solution

The fourth proportional to 652,240.80, 978,361.20 and 628,621.20 is: 942,931.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,240.80 : 978,361.20 = 628,621.20 : x
  2. Step 2: Convert to fraction form
    652,240.80/978,361.20 = 628,621.20/x
  3. Step 3: Cross multiply
    652,240.80x = 978,361.20 × 628,621.20
  4. Step 4: Simplify right side
    652,240.80x = 615,018,591,577.44
  5. Step 5: Solve for x
    x = 615,018,591,577.44/652,240.80
  6. Step 6: Final answer
    x = 942,931.80

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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.