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Finding the Fourth Proportional to 326,039.20, 489,145.20 and 115,655.20

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Solution

The fourth proportional to 326,039.20, 489,145.20 and 115,655.20 is: 173,513.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,039.20 : 489,145.20 = 115,655.20 : x
  2. Step 2: Convert to fraction form
    326,039.20/489,145.20 = 115,655.20/x
  3. Step 3: Cross multiply
    326,039.20x = 489,145.20 × 115,655.20
  4. Step 4: Simplify right side
    326,039.20x = 56,572,185,935.04
  5. Step 5: Solve for x
    x = 56,572,185,935.04/326,039.20
  6. Step 6: Final answer
    x = 173,513.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.