Home / 685,445.70-947,216.34-515,384.58

Finding the Fourth Proportional to 685,445.70, 947,216.34 and 515,384.58

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Solution

The fourth proportional to 685,445.70, 947,216.34 and 515,384.58 is: 712,209.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,445.70 : 947,216.34 = 515,384.58 : x
  2. Step 2: Convert to fraction form
    685,445.70/947,216.34 = 515,384.58/x
  3. Step 3: Cross multiply
    685,445.70x = 947,216.34 × 515,384.58
  4. Step 4: Simplify right side
    685,445.70x = 488,180,695,560.04
  5. Step 5: Solve for x
    x = 488,180,695,560.04/685,445.70
  6. Step 6: Final answer
    x = 712,209.14

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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.