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Finding the Fourth Proportional to 491,055.90, 677,840.70 and 321,290.04

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Solution

The fourth proportional to 491,055.90, 677,840.70 and 321,290.04 is: 443,500.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,055.90 : 677,840.70 = 321,290.04 : x
  2. Step 2: Convert to fraction form
    491,055.90/677,840.70 = 321,290.04/x
  3. Step 3: Cross multiply
    491,055.90x = 677,840.70 × 321,290.04
  4. Step 4: Simplify right side
    491,055.90x = 217,783,465,616.63
  5. Step 5: Solve for x
    x = 217,783,465,616.63/491,055.90
  6. Step 6: Final answer
    x = 443,500.35

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.