Home / 389,991.24-537,667.47-309,684.60

Finding the Fourth Proportional to 389,991.24, 537,667.47 and 309,684.60

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Solution

The fourth proportional to 389,991.24, 537,667.47 and 309,684.60 is: 426,951.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,991.24 : 537,667.47 = 309,684.60 : x
  2. Step 2: Convert to fraction form
    389,991.24/537,667.47 = 309,684.60/x
  3. Step 3: Cross multiply
    389,991.24x = 537,667.47 × 309,684.60
  4. Step 4: Simplify right side
    389,991.24x = 166,507,335,379.96
  5. Step 5: Solve for x
    x = 166,507,335,379.96/389,991.24
  6. Step 6: Final answer
    x = 426,951.48

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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.