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Finding the Fourth Proportional to 355,513.60, 533,270.40 and 261,035.20

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Solution

The fourth proportional to 355,513.60, 533,270.40 and 261,035.20 is: 391,552.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,513.60 : 533,270.40 = 261,035.20 : x
  2. Step 2: Convert to fraction form
    355,513.60/533,270.40 = 261,035.20/x
  3. Step 3: Cross multiply
    355,513.60x = 533,270.40 × 261,035.20
  4. Step 4: Simplify right side
    355,513.60x = 139,202,345,518.08
  5. Step 5: Solve for x
    x = 139,202,345,518.08/355,513.60
  6. Step 6: Final answer
    x = 391,552.80

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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.