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Finding the Fourth Proportional to 661,668.98, 913,311.34 and 375,379.34

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Solution

The fourth proportional to 661,668.98, 913,311.34 and 375,379.34 is: 518,141.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,668.98 : 913,311.34 = 375,379.34 : x
  2. Step 2: Convert to fraction form
    661,668.98/913,311.34 = 375,379.34/x
  3. Step 3: Cross multiply
    661,668.98x = 913,311.34 × 375,379.34
  4. Step 4: Simplify right side
    661,668.98x = 342,838,208,023.72
  5. Step 5: Solve for x
    x = 342,838,208,023.72/661,668.98
  6. Step 6: Final answer
    x = 518,141.58

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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.