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Finding the Fourth Proportional to 670,741.26, 925,317.60 and 398,654.54

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Solution

The fourth proportional to 670,741.26, 925,317.60 and 398,654.54 is: 549,961.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,741.26 : 925,317.60 = 398,654.54 : x
  2. Step 2: Convert to fraction form
    670,741.26/925,317.60 = 398,654.54/x
  3. Step 3: Cross multiply
    670,741.26x = 925,317.60 × 398,654.54
  4. Step 4: Simplify right side
    670,741.26x = 368,882,057,555.32
  5. Step 5: Solve for x
    x = 368,882,057,555.32/670,741.26
  6. Step 6: Final answer
    x = 549,961.78

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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.