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Finding the Fourth Proportional to 820,627.60, 1,230,250.20 and 426,643.60

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Solution

The fourth proportional to 820,627.60, 1,230,250.20 and 426,643.60 is: 639,606.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,627.60 : 1,230,250.20 = 426,643.60 : x
  2. Step 2: Convert to fraction form
    820,627.60/1,230,250.20 = 426,643.60/x
  3. Step 3: Cross multiply
    820,627.60x = 1,230,250.20 × 426,643.60
  4. Step 4: Simplify right side
    820,627.60x = 524,878,374,228.72
  5. Step 5: Solve for x
    x = 524,878,374,228.72/820,627.60
  6. Step 6: Final answer
    x = 639,606.05

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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.