Home / 429,392.12-643,107.20-204,910.20

Finding the Fourth Proportional to 429,392.12, 643,107.20 and 204,910.20

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Solution

The fourth proportional to 429,392.12, 643,107.20 and 204,910.20 is: 306,897.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,392.12 : 643,107.20 = 204,910.20 : x
  2. Step 2: Convert to fraction form
    429,392.12/643,107.20 = 204,910.20/x
  3. Step 3: Cross multiply
    429,392.12x = 643,107.20 × 204,910.20
  4. Step 4: Simplify right side
    429,392.12x = 131,779,224,973.44
  5. Step 5: Solve for x
    x = 131,779,224,973.44/429,392.12
  6. Step 6: Final answer
    x = 306,897.17

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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.