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Finding the Fourth Proportional to 442,953.80, 664,430.70 and 206,320.40

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Solution

The fourth proportional to 442,953.80, 664,430.70 and 206,320.40 is: 309,480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,953.80 : 664,430.70 = 206,320.40 : x
  2. Step 2: Convert to fraction form
    442,953.80/664,430.70 = 206,320.40/x
  3. Step 3: Cross multiply
    442,953.80x = 664,430.70 × 206,320.40
  4. Step 4: Simplify right side
    442,953.80x = 137,085,607,796.28
  5. Step 5: Solve for x
    x = 137,085,607,796.28/442,953.80
  6. Step 6: Final answer
    x = 309,480.60

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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.