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Finding the Fourth Proportional to 661,048.85, 911,911.68 and 431,740.37

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Solution

The fourth proportional to 661,048.85, 911,911.68 and 431,740.37 is: 595,582.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,048.85 : 911,911.68 = 431,740.37 : x
  2. Step 2: Convert to fraction form
    661,048.85/911,911.68 = 431,740.37/x
  3. Step 3: Cross multiply
    661,048.85x = 911,911.68 × 431,740.37
  4. Step 4: Simplify right side
    661,048.85x = 393,709,081,570.96
  5. Step 5: Solve for x
    x = 393,709,081,570.96/661,048.85
  6. Step 6: Final answer
    x = 595,582.44

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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.