Home / 861,369.50-1,188,729.06-479,420.76

Finding the Fourth Proportional to 861,369.50, 1,188,729.06 and 479,420.76

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Solution

The fourth proportional to 861,369.50, 1,188,729.06 and 479,420.76 is: 661,622.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,369.50 : 1,188,729.06 = 479,420.76 : x
  2. Step 2: Convert to fraction form
    861,369.50/1,188,729.06 = 479,420.76/x
  3. Step 3: Cross multiply
    861,369.50x = 1,188,729.06 × 479,420.76
  4. Step 4: Simplify right side
    861,369.50x = 569,901,389,379.29
  5. Step 5: Solve for x
    x = 569,901,389,379.29/861,369.50
  6. Step 6: Final answer
    x = 661,622.44

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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.