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Finding the Fourth Proportional to 455,316, 628,291.17 and 251,353.68

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Solution

The fourth proportional to 455,316, 628,291.17 and 251,353.68 is: 346,843.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,316 : 628,291.17 = 251,353.68 : x
  2. Step 2: Convert to fraction form
    455,316/628,291.17 = 251,353.68/x
  3. Step 3: Cross multiply
    455,316x = 628,291.17 × 251,353.68
  4. Step 4: Simplify right side
    455,316x = 157,923,297,691.01
  5. Step 5: Solve for x
    x = 157,923,297,691.01/455,316
  6. Step 6: Final answer
    x = 346,843.29

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1.5x scale

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.