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Finding the Fourth Proportional to 421,578.99, 581,764.25 and 240,349.28

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Solution

The fourth proportional to 421,578.99, 581,764.25 and 240,349.28 is: 331,673.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,578.99 : 581,764.25 = 240,349.28 : x
  2. Step 2: Convert to fraction form
    421,578.99/581,764.25 = 240,349.28/x
  3. Step 3: Cross multiply
    421,578.99x = 581,764.25 × 240,349.28
  4. Step 4: Simplify right side
    421,578.99x = 139,826,614,506.67
  5. Step 5: Solve for x
    x = 139,826,614,506.67/421,578.99
  6. Step 6: Final answer
    x = 331,673.58

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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.