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Finding the Fourth Proportional to 402,895.62, 556,009.52 and 221,615.19

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Solution

The fourth proportional to 402,895.62, 556,009.52 and 221,615.19 is: 305,836.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,895.62 : 556,009.52 = 221,615.19 : x
  2. Step 2: Convert to fraction form
    402,895.62/556,009.52 = 221,615.19/x
  3. Step 3: Cross multiply
    402,895.62x = 556,009.52 × 221,615.19
  4. Step 4: Simplify right side
    402,895.62x = 123,220,154,308.53
  5. Step 5: Solve for x
    x = 123,220,154,308.53/402,895.62
  6. Step 6: Final answer
    x = 305,836.42

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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.