Home / 402,721.14-555,740.94-221,431.80

Finding the Fourth Proportional to 402,721.14, 555,740.94 and 221,431.80

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Solution

The fourth proportional to 402,721.14, 555,740.94 and 221,431.80 is: 305,568.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,721.14 : 555,740.94 = 221,431.80 : x
  2. Step 2: Convert to fraction form
    402,721.14/555,740.94 = 221,431.80/x
  3. Step 3: Cross multiply
    402,721.14x = 555,740.94 × 221,431.80
  4. Step 4: Simplify right side
    402,721.14x = 123,058,716,677.89
  5. Step 5: Solve for x
    x = 123,058,716,677.89/402,721.14
  6. Step 6: Final answer
    x = 305,568.06

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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.