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Finding the Fourth Proportional to 400,615.20, 600,145.20 and 372,621.60

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Solution

The fourth proportional to 400,615.20, 600,145.20 and 372,621.60 is: 558,209.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,615.20 : 600,145.20 = 372,621.60 : x
  2. Step 2: Convert to fraction form
    400,615.20/600,145.20 = 372,621.60/x
  3. Step 3: Cross multiply
    400,615.20x = 600,145.20 × 372,621.60
  4. Step 4: Simplify right side
    400,615.20x = 223,627,064,656.32
  5. Step 5: Solve for x
    x = 223,627,064,656.32/400,615.20
  6. Step 6: Final answer
    x = 558,209.14

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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.