Home / 513,485.92-708,643.26-287,131.36

Finding the Fourth Proportional to 513,485.92, 708,643.26 and 287,131.36

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Solution

The fourth proportional to 513,485.92, 708,643.26 and 287,131.36 is: 396,259.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,485.92 : 708,643.26 = 287,131.36 : x
  2. Step 2: Convert to fraction form
    513,485.92/708,643.26 = 287,131.36/x
  3. Step 3: Cross multiply
    513,485.92x = 708,643.26 × 287,131.36
  4. Step 4: Simplify right side
    513,485.92x = 203,473,702,998.63
  5. Step 5: Solve for x
    x = 203,473,702,998.63/513,485.92
  6. Step 6: Final answer
    x = 396,259.56

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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.