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Finding the Fourth Proportional to 933,911.20, 1,398,793.20 and 809,495.20

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Solution

The fourth proportional to 933,911.20, 1,398,793.20 and 809,495.20 is: 1,212,445.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    933,911.20 : 1,398,793.20 = 809,495.20 : x
  2. Step 2: Convert to fraction form
    933,911.20/1,398,793.20 = 809,495.20/x
  3. Step 3: Cross multiply
    933,911.20x = 1,398,793.20 × 809,495.20
  4. Step 4: Simplify right side
    933,911.20x = 1,132,316,381,192.64
  5. Step 5: Solve for x
    x = 1,132,316,381,192.64/933,911.20
  6. Step 6: Final answer
    x = 1,212,445.45

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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.