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Finding the Fourth Proportional to 345,348.91, 518,078.73 and 145,698.71

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Solution

The fourth proportional to 345,348.91, 518,078.73 and 145,698.71 is: 218,571.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,348.91 : 518,078.73 = 145,698.71 : x
  2. Step 2: Convert to fraction form
    345,348.91/518,078.73 = 145,698.71/x
  3. Step 3: Cross multiply
    345,348.91x = 518,078.73 × 145,698.71
  4. Step 4: Simplify right side
    345,348.91x = 75,483,399,320.55
  5. Step 5: Solve for x
    x = 75,483,399,320.55/345,348.91
  6. Step 6: Final answer
    x = 218,571.41

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1.5x scale

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.