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Finding the Fourth Proportional to 934,055.20, 1,399,009.20 and 809,639.20

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Solution

The fourth proportional to 934,055.20, 1,399,009.20 and 809,639.20 is: 1,212,661.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    934,055.20 : 1,399,009.20 = 809,639.20 : x
  2. Step 2: Convert to fraction form
    934,055.20/1,399,009.20 = 809,639.20/x
  3. Step 3: Cross multiply
    934,055.20x = 1,399,009.20 × 809,639.20
  4. Step 4: Simplify right side
    934,055.20x = 1,132,692,689,480.64
  5. Step 5: Solve for x
    x = 1,132,692,689,480.64/934,055.20
  6. Step 6: Final answer
    x = 1,212,661.40

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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.