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Finding the Fourth Proportional to 345,512.71, 518,342.86 and 120,880.47

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Solution

The fourth proportional to 345,512.71, 518,342.86 and 120,880.47 is: 181,346.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,512.71 : 518,342.86 = 120,880.47 : x
  2. Step 2: Convert to fraction form
    345,512.71/518,342.86 = 120,880.47/x
  3. Step 3: Cross multiply
    345,512.71x = 518,342.86 × 120,880.47
  4. Step 4: Simplify right side
    345,512.71x = 62,657,527,717.15
  5. Step 5: Solve for x
    x = 62,657,527,717.15/345,512.71
  6. Step 6: Final answer
    x = 181,346.52

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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.