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Finding the Fourth Proportional to 402,901.53, 555,992.51 and 221,613.45

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Solution

The fourth proportional to 402,901.53, 555,992.51 and 221,613.45 is: 305,820.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,901.53 : 555,992.51 = 221,613.45 : x
  2. Step 2: Convert to fraction form
    402,901.53/555,992.51 = 221,613.45/x
  3. Step 3: Cross multiply
    402,901.53x = 555,992.51 × 221,613.45
  4. Step 4: Simplify right side
    402,901.53x = 123,215,419,008.28
  5. Step 5: Solve for x
    x = 123,215,419,008.28/402,901.53
  6. Step 6: Final answer
    x = 305,820.18

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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.