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Finding the Fourth Proportional to 402,603.51, 555,605.28 and 221,329.29

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Solution

The fourth proportional to 402,603.51, 555,605.28 and 221,329.29 is: 305,441.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,603.51 : 555,605.28 = 221,329.29 : x
  2. Step 2: Convert to fraction form
    402,603.51/555,605.28 = 221,329.29/x
  3. Step 3: Cross multiply
    402,603.51x = 555,605.28 × 221,329.29
  4. Step 4: Simplify right side
    402,603.51x = 122,971,722,142.65
  5. Step 5: Solve for x
    x = 122,971,722,142.65/402,603.51
  6. Step 6: Final answer
    x = 305,441.26

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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.