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Finding the Fourth Proportional to 356,523.40, 534,785.10 and 256,990.60

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Solution

The fourth proportional to 356,523.40, 534,785.10 and 256,990.60 is: 385,485.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,523.40 : 534,785.10 = 256,990.60 : x
  2. Step 2: Convert to fraction form
    356,523.40/534,785.10 = 256,990.60/x
  3. Step 3: Cross multiply
    356,523.40x = 534,785.10 × 256,990.60
  4. Step 4: Simplify right side
    356,523.40x = 137,434,743,720.06
  5. Step 5: Solve for x
    x = 137,434,743,720.06/356,523.40
  6. Step 6: Final answer
    x = 385,485.90

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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.