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Finding the Fourth Proportional to 550,706.85, 759,974.81 and 321,421.77

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Solution

The fourth proportional to 550,706.85, 759,974.81 and 321,421.77 is: 443,561.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,706.85 : 759,974.81 = 321,421.77 : x
  2. Step 2: Convert to fraction form
    550,706.85/759,974.81 = 321,421.77/x
  3. Step 3: Cross multiply
    550,706.85x = 759,974.81 × 321,421.77
  4. Step 4: Simplify right side
    550,706.85x = 244,272,446,978.51
  5. Step 5: Solve for x
    x = 244,272,446,978.51/550,706.85
  6. Step 6: Final answer
    x = 443,561.66

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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.