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Finding the Fourth Proportional to 671,040.32, 925,730.46 and 398,953.88

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Solution

The fourth proportional to 671,040.32, 925,730.46 and 398,953.88 is: 550,374.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,040.32 : 925,730.46 = 398,953.88 : x
  2. Step 2: Convert to fraction form
    671,040.32/925,730.46 = 398,953.88/x
  3. Step 3: Cross multiply
    671,040.32x = 925,730.46 × 398,953.88
  4. Step 4: Simplify right side
    671,040.32x = 369,323,758,851.19
  5. Step 5: Solve for x
    x = 369,323,758,851.19/671,040.32
  6. Step 6: Final answer
    x = 550,374.91

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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.