Home / 899,185.32-1,240,861.26-491,278.40

Finding the Fourth Proportional to 899,185.32, 1,240,861.26 and 491,278.40

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Solution

The fourth proportional to 899,185.32, 1,240,861.26 and 491,278.40 is: 677,956.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    899,185.32 : 1,240,861.26 = 491,278.40 : x
  2. Step 2: Convert to fraction form
    899,185.32/1,240,861.26 = 491,278.40/x
  3. Step 3: Cross multiply
    899,185.32x = 1,240,861.26 × 491,278.40
  4. Step 4: Simplify right side
    899,185.32x = 609,608,334,434.78
  5. Step 5: Solve for x
    x = 609,608,334,434.78/899,185.32
  6. Step 6: Final answer
    x = 677,956.28

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Double scale
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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.