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Finding the Fourth Proportional to 671,028.32, 925,713.92 and 398,941.86

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Solution

The fourth proportional to 671,028.32, 925,713.92 and 398,941.86 is: 550,358.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,028.32 : 925,713.92 = 398,941.86 : x
  2. Step 2: Convert to fraction form
    671,028.32/925,713.92 = 398,941.86/x
  3. Step 3: Cross multiply
    671,028.32x = 925,713.92 × 398,941.86
  4. Step 4: Simplify right side
    671,028.32x = 369,306,033,072.69
  5. Step 5: Solve for x
    x = 369,306,033,072.69/671,028.32
  6. Step 6: Final answer
    x = 550,358.34

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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.