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Finding the Fourth Proportional to 402,699.33, 555,713.33 and 221,411.07

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Solution

The fourth proportional to 402,699.33, 555,713.33 and 221,411.07 is: 305,540.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,699.33 : 555,713.33 = 221,411.07 : x
  2. Step 2: Convert to fraction form
    402,699.33/555,713.33 = 221,411.07/x
  3. Step 3: Cross multiply
    402,699.33x = 555,713.33 × 221,411.07
  4. Step 4: Simplify right side
    402,699.33x = 123,041,081,901.51
  5. Step 5: Solve for x
    x = 123,041,081,901.51/402,699.33
  6. Step 6: Final answer
    x = 305,540.82

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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.