Home / 685,444.70-947,214.96-515,383.58

Finding the Fourth Proportional to 685,444.70, 947,214.96 and 515,383.58

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Solution

The fourth proportional to 685,444.70, 947,214.96 and 515,383.58 is: 712,207.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,444.70 : 947,214.96 = 515,383.58 : x
  2. Step 2: Convert to fraction form
    685,444.70/947,214.96 = 515,383.58/x
  3. Step 3: Cross multiply
    685,444.70x = 947,214.96 × 515,383.58
  4. Step 4: Simplify right side
    685,444.70x = 488,179,037,114.36
  5. Step 5: Solve for x
    x = 488,179,037,114.36/685,444.70
  6. Step 6: Final answer
    x = 712,207.76

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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.