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Finding the Fourth Proportional to 668,078.10, 1,002,117.15 and 620,838.90

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Solution

The fourth proportional to 668,078.10, 1,002,117.15 and 620,838.90 is: 931,258.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,078.10 : 1,002,117.15 = 620,838.90 : x
  2. Step 2: Convert to fraction form
    668,078.10/1,002,117.15 = 620,838.90/x
  3. Step 3: Cross multiply
    668,078.10x = 1,002,117.15 × 620,838.90
  4. Step 4: Simplify right side
    668,078.10x = 622,153,309,077.14
  5. Step 5: Solve for x
    x = 622,153,309,077.14/668,078.10
  6. Step 6: Final answer
    x = 931,258.35

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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.