Home / 861,439.08-1,188,765.72-479,457.66

Finding the Fourth Proportional to 861,439.08, 1,188,765.72 and 479,457.66

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Solution

The fourth proportional to 861,439.08, 1,188,765.72 and 479,457.66 is: 661,640.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,439.08 : 1,188,765.72 = 479,457.66 : x
  2. Step 2: Convert to fraction form
    861,439.08/1,188,765.72 = 479,457.66/x
  3. Step 3: Cross multiply
    861,439.08x = 1,188,765.72 × 479,457.66
  4. Step 4: Simplify right side
    861,439.08x = 569,962,830,399.42
  5. Step 5: Solve for x
    x = 569,962,830,399.42/861,439.08
  6. Step 6: Final answer
    x = 661,640.32

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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.