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Finding the Fourth Proportional to 402,969.73, 556,080.66 and 221,670.16

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Solution

The fourth proportional to 402,969.73, 556,080.66 and 221,670.16 is: 305,895.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,969.73 : 556,080.66 = 221,670.16 : x
  2. Step 2: Convert to fraction form
    402,969.73/556,080.66 = 221,670.16/x
  3. Step 3: Cross multiply
    402,969.73x = 556,080.66 × 221,670.16
  4. Step 4: Simplify right side
    402,969.73x = 123,266,488,875.11
  5. Step 5: Solve for x
    x = 123,266,488,875.11/402,969.73
  6. Step 6: Final answer
    x = 305,895.16

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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.