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Finding the Fourth Proportional to 368,889.40, 553,334.10 and 331,564.60

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Solution

The fourth proportional to 368,889.40, 553,334.10 and 331,564.60 is: 497,346.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,889.40 : 553,334.10 = 331,564.60 : x
  2. Step 2: Convert to fraction form
    368,889.40/553,334.10 = 331,564.60/x
  3. Step 3: Cross multiply
    368,889.40x = 553,334.10 × 331,564.60
  4. Step 4: Simplify right side
    368,889.40x = 183,465,999,532.86
  5. Step 5: Solve for x
    x = 183,465,999,532.86/368,889.40
  6. Step 6: Final answer
    x = 497,346.90

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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.