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Finding the Fourth Proportional to 315,511.07, 435,404.97 and 172,271.07

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Solution

The fourth proportional to 315,511.07, 435,404.97 and 172,271.07 is: 237,733.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,511.07 : 435,404.97 = 172,271.07 : x
  2. Step 2: Convert to fraction form
    315,511.07/435,404.97 = 172,271.07/x
  3. Step 3: Cross multiply
    315,511.07x = 435,404.97 × 172,271.07
  4. Step 4: Simplify right side
    315,511.07x = 75,007,680,065.22
  5. Step 5: Solve for x
    x = 75,007,680,065.22/315,511.07
  6. Step 6: Final answer
    x = 237,733.91

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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.