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Finding the Fourth Proportional to 670,366.38, 925,403.80 and 398,522.28

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Solution

The fourth proportional to 670,366.38, 925,403.80 and 398,522.28 is: 550,138.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,366.38 : 925,403.80 = 398,522.28 : x
  2. Step 2: Convert to fraction form
    670,366.38/925,403.80 = 398,522.28/x
  3. Step 3: Cross multiply
    670,366.38x = 925,403.80 × 398,522.28
  4. Step 4: Simplify right side
    670,366.38x = 368,794,032,296.66
  5. Step 5: Solve for x
    x = 368,794,032,296.66/670,366.38
  6. Step 6: Final answer
    x = 550,138.02

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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.