Home / 429,215.40-643,272.30-239,675.40

Finding the Fourth Proportional to 429,215.40, 643,272.30 and 239,675.40

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Solution

The fourth proportional to 429,215.40, 643,272.30 and 239,675.40 is: 359,205.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,215.40 : 643,272.30 = 239,675.40 : x
  2. Step 2: Convert to fraction form
    429,215.40/643,272.30 = 239,675.40/x
  3. Step 3: Cross multiply
    429,215.40x = 643,272.30 × 239,675.40
  4. Step 4: Simplify right side
    429,215.40x = 154,176,545,811.42
  5. Step 5: Solve for x
    x = 154,176,545,811.42/429,215.40
  6. Step 6: Final answer
    x = 359,205.53

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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.