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Finding the Fourth Proportional to 403,003.63, 556,144.98 and 221,711.68

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Solution

The fourth proportional to 403,003.63, 556,144.98 and 221,711.68 is: 305,962.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,003.63 : 556,144.98 = 221,711.68 : x
  2. Step 2: Convert to fraction form
    403,003.63/556,144.98 = 221,711.68/x
  3. Step 3: Cross multiply
    403,003.63x = 556,144.98 × 221,711.68
  4. Step 4: Simplify right side
    403,003.63x = 123,303,835,058.64
  5. Step 5: Solve for x
    x = 123,303,835,058.64/403,003.63
  6. Step 6: Final answer
    x = 305,962.10

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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.