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Finding the Fourth Proportional to 671,026.32, 925,711.16 and 398,939.85

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Solution

The fourth proportional to 671,026.32, 925,711.16 and 398,939.85 is: 550,355.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,026.32 : 925,711.16 = 398,939.85 : x
  2. Step 2: Convert to fraction form
    671,026.32/925,711.16 = 398,939.85/x
  3. Step 3: Cross multiply
    671,026.32x = 925,711.16 × 398,939.85
  4. Step 4: Simplify right side
    671,026.32x = 369,303,069,319.03
  5. Step 5: Solve for x
    x = 369,303,069,319.03/671,026.32
  6. Step 6: Final answer
    x = 550,355.56

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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.