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Finding the Fourth Proportional to 653,069.20, 978,291.60 and 372,258.40

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Solution

The fourth proportional to 653,069.20, 978,291.60 and 372,258.40 is: 557,639.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,069.20 : 978,291.60 = 372,258.40 : x
  2. Step 2: Convert to fraction form
    653,069.20/978,291.60 = 372,258.40/x
  3. Step 3: Cross multiply
    653,069.20x = 978,291.60 × 372,258.40
  4. Step 4: Simplify right side
    653,069.20x = 364,177,265,749.44
  5. Step 5: Solve for x
    x = 364,177,265,749.44/653,069.20
  6. Step 6: Final answer
    x = 557,639.63

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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.