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Finding the Fourth Proportional to 670,972.30, 925,588.87 and 398,846.64

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Solution

The fourth proportional to 670,972.30, 925,588.87 and 398,846.64 is: 550,198.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,972.30 : 925,588.87 = 398,846.64 : x
  2. Step 2: Convert to fraction form
    670,972.30/925,588.87 = 398,846.64/x
  3. Step 3: Cross multiply
    670,972.30x = 925,588.87 × 398,846.64
  4. Step 4: Simplify right side
    670,972.30x = 369,168,010,820.90
  5. Step 5: Solve for x
    x = 369,168,010,820.90/670,972.30
  6. Step 6: Final answer
    x = 550,198.59

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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.