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Finding the Fourth Proportional to 670,719, 925,832.98 and 398,786.25

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Solution

The fourth proportional to 670,719, 925,832.98 and 398,786.25 is: 550,468.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,719 : 925,832.98 = 398,786.25 : x
  2. Step 2: Convert to fraction form
    670,719/925,832.98 = 398,786.25/x
  3. Step 3: Cross multiply
    670,719x = 925,832.98 × 398,786.25
  4. Step 4: Simplify right side
    670,719x = 369,209,462,220.53
  5. Step 5: Solve for x
    x = 369,209,462,220.53/670,719
  6. Step 6: Final answer
    x = 550,468.17

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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.