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Finding the Fourth Proportional to 686,263.55, 947,043.79 and 380,359.68

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Solution

The fourth proportional to 686,263.55, 947,043.79 and 380,359.68 is: 524,896.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,263.55 : 947,043.79 = 380,359.68 : x
  2. Step 2: Convert to fraction form
    686,263.55/947,043.79 = 380,359.68/x
  3. Step 3: Cross multiply
    686,263.55x = 947,043.79 × 380,359.68
  4. Step 4: Simplify right side
    686,263.55x = 360,217,272,910.39
  5. Step 5: Solve for x
    x = 360,217,272,910.39/686,263.55
  6. Step 6: Final answer
    x = 524,896.41

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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.