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Finding the Fourth Proportional to 490,254.32, 676,278.66 and 455,576.87

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Solution

The fourth proportional to 490,254.32, 676,278.66 and 455,576.87 is: 628,443.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,254.32 : 676,278.66 = 455,576.87 : x
  2. Step 2: Convert to fraction form
    490,254.32/676,278.66 = 455,576.87/x
  3. Step 3: Cross multiply
    490,254.32x = 676,278.66 × 455,576.87
  4. Step 4: Simplify right side
    490,254.32x = 308,096,919,675.88
  5. Step 5: Solve for x
    x = 308,096,919,675.88/490,254.32
  6. Step 6: Final answer
    x = 628,443.05

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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.