Home / 381,256.47-571,485.65-128,449.60

Finding the Fourth Proportional to 381,256.47, 571,485.65 and 128,449.60

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Solution

The fourth proportional to 381,256.47, 571,485.65 and 128,449.60 is: 192,539.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,256.47 : 571,485.65 = 128,449.60 : x
  2. Step 2: Convert to fraction form
    381,256.47/571,485.65 = 128,449.60/x
  3. Step 3: Cross multiply
    381,256.47x = 571,485.65 × 128,449.60
  4. Step 4: Simplify right side
    381,256.47x = 73,407,101,077.28
  5. Step 5: Solve for x
    x = 73,407,101,077.28/381,256.47
  6. Step 6: Final answer
    x = 192,539.95

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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.