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Finding the Fourth Proportional to 401,978.07, 554,730.71 and 220,701.68

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Solution

The fourth proportional to 401,978.07, 554,730.71 and 220,701.68 is: 304,568.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,978.07 : 554,730.71 = 220,701.68 : x
  2. Step 2: Convert to fraction form
    401,978.07/554,730.71 = 220,701.68/x
  3. Step 3: Cross multiply
    401,978.07x = 554,730.71 × 220,701.68
  4. Step 4: Simplify right side
    401,978.07x = 122,430,000,968.03
  5. Step 5: Solve for x
    x = 122,430,000,968.03/401,978.07
  6. Step 6: Final answer
    x = 304,568.86

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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.