Home / 381,254.22-571,482.27-128,447.35

Finding the Fourth Proportional to 381,254.22, 571,482.27 and 128,447.35

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Solution

The fourth proportional to 381,254.22, 571,482.27 and 128,447.35 is: 192,536.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,254.22 : 571,482.27 = 128,447.35 : x
  2. Step 2: Convert to fraction form
    381,254.22/571,482.27 = 128,447.35/x
  3. Step 3: Cross multiply
    381,254.22x = 571,482.27 × 128,447.35
  4. Step 4: Simplify right side
    381,254.22x = 73,405,381,724.78
  5. Step 5: Solve for x
    x = 73,405,381,724.78/381,254.22
  6. Step 6: Final answer
    x = 192,536.58

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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.