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Finding the Fourth Proportional to 311,391.92, 429,752.59 and 190,613.02

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Solution

The fourth proportional to 311,391.92, 429,752.59 and 190,613.02 is: 263,065.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,391.92 : 429,752.59 = 190,613.02 : x
  2. Step 2: Convert to fraction form
    311,391.92/429,752.59 = 190,613.02/x
  3. Step 3: Cross multiply
    311,391.92x = 429,752.59 × 190,613.02
  4. Step 4: Simplify right side
    311,391.92x = 81,916,439,032.72
  5. Step 5: Solve for x
    x = 81,916,439,032.72/311,391.92
  6. Step 6: Final answer
    x = 263,065.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.