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Finding the Fourth Proportional to 401,710.61, 554,342.09 and 220,418.03

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Solution

The fourth proportional to 401,710.61, 554,342.09 and 220,418.03 is: 304,166.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,710.61 : 554,342.09 = 220,418.03 : x
  2. Step 2: Convert to fraction form
    401,710.61/554,342.09 = 220,418.03/x
  3. Step 3: Cross multiply
    401,710.61x = 554,342.09 × 220,418.03
  4. Step 4: Simplify right side
    401,710.61x = 122,186,991,423.88
  5. Step 5: Solve for x
    x = 122,186,991,423.88/401,710.61
  6. Step 6: Final answer
    x = 304,166.70

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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.