Home / 686,835.85-947,769.98-380,906.60

Finding the Fourth Proportional to 686,835.85, 947,769.98 and 380,906.60

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Solution

The fourth proportional to 686,835.85, 947,769.98 and 380,906.60 is: 525,615.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,835.85 : 947,769.98 = 380,906.60 : x
  2. Step 2: Convert to fraction form
    686,835.85/947,769.98 = 380,906.60/x
  3. Step 3: Cross multiply
    686,835.85x = 947,769.98 × 380,906.60
  4. Step 4: Simplify right side
    686,835.85x = 361,011,836,877.29
  5. Step 5: Solve for x
    x = 361,011,836,877.29/686,835.85
  6. Step 6: Final answer
    x = 525,615.89

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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.