Home / 402,721.96-555,768.40-221,424.52

Finding the Fourth Proportional to 402,721.96, 555,768.40 and 221,424.52

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Solution

The fourth proportional to 402,721.96, 555,768.40 and 221,424.52 is: 305,572.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,721.96 : 555,768.40 = 221,424.52 : x
  2. Step 2: Convert to fraction form
    402,721.96/555,768.40 = 221,424.52/x
  3. Step 3: Cross multiply
    402,721.96x = 555,768.40 × 221,424.52
  4. Step 4: Simplify right side
    402,721.96x = 123,060,751,201.17
  5. Step 5: Solve for x
    x = 123,060,751,201.17/402,721.96
  6. Step 6: Final answer
    x = 305,572.49

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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.