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Finding the Fourth Proportional to 261,080.79, 391,013.94 and 253,897.47

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Solution

The fourth proportional to 261,080.79, 391,013.94 and 253,897.47 is: 380,255.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,080.79 : 391,013.94 = 253,897.47 : x
  2. Step 2: Convert to fraction form
    261,080.79/391,013.94 = 253,897.47/x
  3. Step 3: Cross multiply
    261,080.79x = 391,013.94 × 253,897.47
  4. Step 4: Simplify right side
    261,080.79x = 99,277,450,100.73
  5. Step 5: Solve for x
    x = 99,277,450,100.73/261,080.79
  6. Step 6: Final answer
    x = 380,255.67

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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.