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Finding the Fourth Proportional to 355,921.20, 533,881.80 and 343,479.60

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Solution

The fourth proportional to 355,921.20, 533,881.80 and 343,479.60 is: 515,219.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,921.20 : 533,881.80 = 343,479.60 : x
  2. Step 2: Convert to fraction form
    355,921.20/533,881.80 = 343,479.60/x
  3. Step 3: Cross multiply
    355,921.20x = 533,881.80 × 343,479.60
  4. Step 4: Simplify right side
    355,921.20x = 183,377,507,111.28
  5. Step 5: Solve for x
    x = 183,377,507,111.28/355,921.20
  6. Step 6: Final answer
    x = 515,219.40

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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.