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Finding the Fourth Proportional to 402,802.22, 555,881.32 and 221,528.18

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Solution

The fourth proportional to 402,802.22, 555,881.32 and 221,528.18 is: 305,716.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,802.22 : 555,881.32 = 221,528.18 : x
  2. Step 2: Convert to fraction form
    402,802.22/555,881.32 = 221,528.18/x
  3. Step 3: Cross multiply
    402,802.22x = 555,881.32 × 221,528.18
  4. Step 4: Simplify right side
    402,802.22x = 123,143,374,336.19
  5. Step 5: Solve for x
    x = 123,143,374,336.19/402,802.22
  6. Step 6: Final answer
    x = 305,716.73

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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.