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Finding the Fourth Proportional to 355,467.69, 487,934.28 and 314,279.19

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Solution

The fourth proportional to 355,467.69, 487,934.28 and 314,279.19 is: 431,396.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,467.69 : 487,934.28 = 314,279.19 : x
  2. Step 2: Convert to fraction form
    355,467.69/487,934.28 = 314,279.19/x
  3. Step 3: Cross multiply
    355,467.69x = 487,934.28 × 314,279.19
  4. Step 4: Simplify right side
    355,467.69x = 153,347,590,291.63
  5. Step 5: Solve for x
    x = 153,347,590,291.63/355,467.69
  6. Step 6: Final answer
    x = 431,396.71

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.