Home / 429,266.20-643,899.30-219,314.20

Finding the Fourth Proportional to 429,266.20, 643,899.30 and 219,314.20

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Solution

The fourth proportional to 429,266.20, 643,899.30 and 219,314.20 is: 328,971.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,266.20 : 643,899.30 = 219,314.20 : x
  2. Step 2: Convert to fraction form
    429,266.20/643,899.30 = 219,314.20/x
  3. Step 3: Cross multiply
    429,266.20x = 643,899.30 × 219,314.20
  4. Step 4: Simplify right side
    429,266.20x = 141,216,259,860.06
  5. Step 5: Solve for x
    x = 141,216,259,860.06/429,266.20
  6. Step 6: Final answer
    x = 328,971.30

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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.