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Finding the Fourth Proportional to 640,935.20, 960,135.60 and 562,138.40

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Solution

The fourth proportional to 640,935.20, 960,135.60 and 562,138.40 is: 842,096.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,935.20 : 960,135.60 = 562,138.40 : x
  2. Step 2: Convert to fraction form
    640,935.20/960,135.60 = 562,138.40/x
  3. Step 3: Cross multiply
    640,935.20x = 960,135.60 × 562,138.40
  4. Step 4: Simplify right side
    640,935.20x = 539,729,089,967.04
  5. Step 5: Solve for x
    x = 539,729,089,967.04/640,935.20
  6. Step 6: Final answer
    x = 842,096.19

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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.