Home / 810,643.80-1,215,965.70-219,667.80

Finding the Fourth Proportional to 810,643.80, 1,215,965.70 and 219,667.80

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Solution

The fourth proportional to 810,643.80, 1,215,965.70 and 219,667.80 is: 329,501.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,643.80 : 1,215,965.70 = 219,667.80 : x
  2. Step 2: Convert to fraction form
    810,643.80/1,215,965.70 = 219,667.80/x
  3. Step 3: Cross multiply
    810,643.80x = 1,215,965.70 × 219,667.80
  4. Step 4: Simplify right side
    810,643.80x = 267,108,510,194.46
  5. Step 5: Solve for x
    x = 267,108,510,194.46/810,643.80
  6. Step 6: Final answer
    x = 329,501.70

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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.