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Finding the Fourth Proportional to 606,940.80, 910,411.20 and 212,956.80

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Solution

The fourth proportional to 606,940.80, 910,411.20 and 212,956.80 is: 319,435.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,940.80 : 910,411.20 = 212,956.80 : x
  2. Step 2: Convert to fraction form
    606,940.80/910,411.20 = 212,956.80/x
  3. Step 3: Cross multiply
    606,940.80x = 910,411.20 × 212,956.80
  4. Step 4: Simplify right side
    606,940.80x = 193,878,255,836.16
  5. Step 5: Solve for x
    x = 193,878,255,836.16/606,940.80
  6. Step 6: Final answer
    x = 319,435.20

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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.