Home / 685,450.72-947,223.24-515,389.60

Finding the Fourth Proportional to 685,450.72, 947,223.24 and 515,389.60

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Solution

The fourth proportional to 685,450.72, 947,223.24 and 515,389.60 is: 712,216.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,450.72 : 947,223.24 = 515,389.60 : x
  2. Step 2: Convert to fraction form
    685,450.72/947,223.24 = 515,389.60/x
  3. Step 3: Cross multiply
    685,450.72x = 947,223.24 × 515,389.60
  4. Step 4: Simplify right side
    685,450.72x = 488,189,006,774.30
  5. Step 5: Solve for x
    x = 488,189,006,774.30/685,450.72
  6. Step 6: Final answer
    x = 712,216.05

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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.