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Finding the Fourth Proportional to 455,279.30, 628,294.62 and 251,329.40

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Solution

The fourth proportional to 455,279.30, 628,294.62 and 251,329.40 is: 346,839.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,279.30 : 628,294.62 = 251,329.40 : x
  2. Step 2: Convert to fraction form
    455,279.30/628,294.62 = 251,329.40/x
  3. Step 3: Cross multiply
    455,279.30x = 628,294.62 × 251,329.40
  4. Step 4: Simplify right side
    455,279.30x = 157,908,906,726.36
  5. Step 5: Solve for x
    x = 157,908,906,726.36/455,279.30
  6. Step 6: Final answer
    x = 346,839.64

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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.