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Finding the Fourth Proportional to 648,604.40, 972,388.20 and 274,319.60

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Solution

The fourth proportional to 648,604.40, 972,388.20 and 274,319.60 is: 411,260.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,604.40 : 972,388.20 = 274,319.60 : x
  2. Step 2: Convert to fraction form
    648,604.40/972,388.20 = 274,319.60/x
  3. Step 3: Cross multiply
    648,604.40x = 972,388.20 × 274,319.60
  4. Step 4: Simplify right side
    648,604.40x = 266,745,142,068.72
  5. Step 5: Solve for x
    x = 266,745,142,068.72/648,604.40
  6. Step 6: Final answer
    x = 411,260.15

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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.