Home / 402,788.58-555,836.49-221,500.32

Finding the Fourth Proportional to 402,788.58, 555,836.49 and 221,500.32

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Solution

The fourth proportional to 402,788.58, 555,836.49 and 221,500.32 is: 305,663.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,788.58 : 555,836.49 = 221,500.32 : x
  2. Step 2: Convert to fraction form
    402,788.58/555,836.49 = 221,500.32/x
  3. Step 3: Cross multiply
    402,788.58x = 555,836.49 × 221,500.32
  4. Step 4: Simplify right side
    402,788.58x = 123,117,960,402.68
  5. Step 5: Solve for x
    x = 123,117,960,402.68/402,788.58
  6. Step 6: Final answer
    x = 305,663.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.