Home / 402,999.09-556,138.74-221,707.13

Finding the Fourth Proportional to 402,999.09, 556,138.74 and 221,707.13

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Solution

The fourth proportional to 402,999.09, 556,138.74 and 221,707.13 is: 305,955.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,999.09 : 556,138.74 = 221,707.13 : x
  2. Step 2: Convert to fraction form
    402,999.09/556,138.74 = 221,707.13/x
  3. Step 3: Cross multiply
    402,999.09x = 556,138.74 × 221,707.13
  4. Step 4: Simplify right side
    402,999.09x = 123,299,921,146.52
  5. Step 5: Solve for x
    x = 123,299,921,146.52/402,999.09
  6. Step 6: Final answer
    x = 305,955.83

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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.