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Finding the Fourth Proportional to 668,113.10, 1,002,242.55 and 647,117.90

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Solution

The fourth proportional to 668,113.10, 1,002,242.55 and 647,117.90 is: 970,747.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,113.10 : 1,002,242.55 = 647,117.90 : x
  2. Step 2: Convert to fraction form
    668,113.10/1,002,242.55 = 647,117.90/x
  3. Step 3: Cross multiply
    668,113.10x = 1,002,242.55 × 647,117.90
  4. Step 4: Simplify right side
    668,113.10x = 648,569,094,246.65
  5. Step 5: Solve for x
    x = 648,569,094,246.65/668,113.10
  6. Step 6: Final answer
    x = 970,747.46

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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.