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Finding the Fourth Proportional to 418,323.60, 627,485.40 and 389,455.20

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Solution

The fourth proportional to 418,323.60, 627,485.40 and 389,455.20 is: 584,182.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,323.60 : 627,485.40 = 389,455.20 : x
  2. Step 2: Convert to fraction form
    418,323.60/627,485.40 = 389,455.20/x
  3. Step 3: Cross multiply
    418,323.60x = 627,485.40 × 389,455.20
  4. Step 4: Simplify right side
    418,323.60x = 244,377,451,954.08
  5. Step 5: Solve for x
    x = 244,377,451,954.08/418,323.60
  6. Step 6: Final answer
    x = 584,182.80

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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.