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Finding the Fourth Proportional to 686,980.44, 948,020.76 and 385,174.44

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Solution

The fourth proportional to 686,980.44, 948,020.76 and 385,174.44 is: 531,533.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,980.44 : 948,020.76 = 385,174.44 : x
  2. Step 2: Convert to fraction form
    686,980.44/948,020.76 = 385,174.44/x
  3. Step 3: Cross multiply
    686,980.44x = 948,020.76 × 385,174.44
  4. Step 4: Simplify right side
    686,980.44x = 365,153,365,341.37
  5. Step 5: Solve for x
    x = 365,153,365,341.37/686,980.44
  6. Step 6: Final answer
    x = 531,533.86

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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.