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Finding the Fourth Proportional to 455,347.86, 628,363.62 and 251,394.32

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Solution

The fourth proportional to 455,347.86, 628,363.62 and 251,394.32 is: 346,915.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,347.86 : 628,363.62 = 251,394.32 : x
  2. Step 2: Convert to fraction form
    455,347.86/628,363.62 = 251,394.32/x
  3. Step 3: Cross multiply
    455,347.86x = 628,363.62 × 251,394.32
  4. Step 4: Simplify right side
    455,347.86x = 157,967,041,820.82
  5. Step 5: Solve for x
    x = 157,967,041,820.82/455,347.86
  6. Step 6: Final answer
    x = 346,915.09

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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.