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Finding the Fourth Proportional to 342,216.77, 513,397.41 and 128,980.15

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Solution

The fourth proportional to 342,216.77, 513,397.41 and 128,980.15 is: 193,497.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,216.77 : 513,397.41 = 128,980.15 : x
  2. Step 2: Convert to fraction form
    342,216.77/513,397.41 = 128,980.15/x
  3. Step 3: Cross multiply
    342,216.77x = 513,397.41 × 128,980.15
  4. Step 4: Simplify right side
    342,216.77x = 66,218,073,184.24
  5. Step 5: Solve for x
    x = 66,218,073,184.24/342,216.77
  6. Step 6: Final answer
    x = 193,497.46

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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.