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Finding the Fourth Proportional to 309,287.50, 426,817.56 and 180,302.56

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Solution

The fourth proportional to 309,287.50, 426,817.56 and 180,302.56 is: 248,818.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,287.50 : 426,817.56 = 180,302.56 : x
  2. Step 2: Convert to fraction form
    309,287.50/426,817.56 = 180,302.56/x
  3. Step 3: Cross multiply
    309,287.50x = 426,817.56 × 180,302.56
  4. Step 4: Simplify right side
    309,287.50x = 76,956,298,720.95
  5. Step 5: Solve for x
    x = 76,956,298,720.95/309,287.50
  6. Step 6: Final answer
    x = 248,818.00

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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.