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Finding the Fourth Proportional to 605,505.90, 908,258.85 and 418,881.90

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Solution

The fourth proportional to 605,505.90, 908,258.85 and 418,881.90 is: 628,322.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,505.90 : 908,258.85 = 418,881.90 : x
  2. Step 2: Convert to fraction form
    605,505.90/908,258.85 = 418,881.90/x
  3. Step 3: Cross multiply
    605,505.90x = 908,258.85 × 418,881.90
  4. Step 4: Simplify right side
    605,505.90x = 380,453,192,779.82
  5. Step 5: Solve for x
    x = 380,453,192,779.82/605,505.90
  6. Step 6: Final answer
    x = 628,322.85

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.