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Finding the Fourth Proportional to 254,462.40, 381,693.60 and 128,491.20

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Solution

The fourth proportional to 254,462.40, 381,693.60 and 128,491.20 is: 192,736.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,462.40 : 381,693.60 = 128,491.20 : x
  2. Step 2: Convert to fraction form
    254,462.40/381,693.60 = 128,491.20/x
  3. Step 3: Cross multiply
    254,462.40x = 381,693.60 × 128,491.20
  4. Step 4: Simplify right side
    254,462.40x = 49,044,268,696.32
  5. Step 5: Solve for x
    x = 49,044,268,696.32/254,462.40
  6. Step 6: Final answer
    x = 192,736.80

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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.