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Finding the Fourth Proportional to 429,069.80, 643,313.10 and 162,790.40

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Solution

The fourth proportional to 429,069.80, 643,313.10 and 162,790.40 is: 244,074.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,069.80 : 643,313.10 = 162,790.40 : x
  2. Step 2: Convert to fraction form
    429,069.80/643,313.10 = 162,790.40/x
  3. Step 3: Cross multiply
    429,069.80x = 643,313.10 × 162,790.40
  4. Step 4: Simplify right side
    429,069.80x = 104,725,196,874.24
  5. Step 5: Solve for x
    x = 104,725,196,874.24/429,069.80
  6. Step 6: Final answer
    x = 244,074.97

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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.