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Finding the Fourth Proportional to 640,880.60, 960,168.90 and 307,722.20

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Solution

The fourth proportional to 640,880.60, 960,168.90 and 307,722.20 is: 461,030.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,880.60 : 960,168.90 = 307,722.20 : x
  2. Step 2: Convert to fraction form
    640,880.60/960,168.90 = 307,722.20/x
  3. Step 3: Cross multiply
    640,880.60x = 960,168.90 × 307,722.20
  4. Step 4: Simplify right side
    640,880.60x = 295,465,286,279.58
  5. Step 5: Solve for x
    x = 295,465,286,279.58/640,880.60
  6. Step 6: Final answer
    x = 461,030.16

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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.