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Finding the Fourth Proportional to 252,923.40, 379,406.70 and 86,711.40

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Solution

The fourth proportional to 252,923.40, 379,406.70 and 86,711.40 is: 130,074.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,923.40 : 379,406.70 = 86,711.40 : x
  2. Step 2: Convert to fraction form
    252,923.40/379,406.70 = 86,711.40/x
  3. Step 3: Cross multiply
    252,923.40x = 379,406.70 × 86,711.40
  4. Step 4: Simplify right side
    252,923.40x = 32,898,886,126.38
  5. Step 5: Solve for x
    x = 32,898,886,126.38/252,923.40
  6. Step 6: Final answer
    x = 130,074.51

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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.