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Finding the Fourth Proportional to 401,978.57, 554,731.40 and 220,702.19

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Solution

The fourth proportional to 401,978.57, 554,731.40 and 220,702.19 is: 304,569.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,978.57 : 554,731.40 = 220,702.19 : x
  2. Step 2: Convert to fraction form
    401,978.57/554,731.40 = 220,702.19/x
  3. Step 3: Cross multiply
    401,978.57x = 554,731.40 × 220,702.19
  4. Step 4: Simplify right side
    401,978.57x = 122,430,430,964.60
  5. Step 5: Solve for x
    x = 122,430,430,964.60/401,978.57
  6. Step 6: Final answer
    x = 304,569.55

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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.