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Finding the Fourth Proportional to 309,077.76, 426,376.80 and 201,599.04

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Solution

The fourth proportional to 309,077.76, 426,376.80 and 201,599.04 is: 278,108.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,077.76 : 426,376.80 = 201,599.04 : x
  2. Step 2: Convert to fraction form
    309,077.76/426,376.80 = 201,599.04/x
  3. Step 3: Cross multiply
    309,077.76x = 426,376.80 × 201,599.04
  4. Step 4: Simplify right side
    309,077.76x = 85,957,153,558.27
  5. Step 5: Solve for x
    x = 85,957,153,558.27/309,077.76
  6. Step 6: Final answer
    x = 278,108.50

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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.