Home / 429,224.72-643,688.36-215,910.19

Finding the Fourth Proportional to 429,224.72, 643,688.36 and 215,910.19

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Solution

The fourth proportional to 429,224.72, 643,688.36 and 215,910.19 is: 323,790.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,224.72 : 643,688.36 = 215,910.19 : x
  2. Step 2: Convert to fraction form
    429,224.72/643,688.36 = 215,910.19/x
  3. Step 3: Cross multiply
    429,224.72x = 643,688.36 × 215,910.19
  4. Step 4: Simplify right side
    429,224.72x = 138,978,871,810.40
  5. Step 5: Solve for x
    x = 138,978,871,810.40/429,224.72
  6. Step 6: Final answer
    x = 323,790.47

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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.