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Finding the Fourth Proportional to 455,759.61, 628,944.55 and 251,809.87

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Solution

The fourth proportional to 455,759.61, 628,944.55 and 251,809.87 is: 347,495.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,759.61 : 628,944.55 = 251,809.87 : x
  2. Step 2: Convert to fraction form
    455,759.61/628,944.55 = 251,809.87/x
  3. Step 3: Cross multiply
    455,759.61x = 628,944.55 × 251,809.87
  4. Step 4: Simplify right side
    455,759.61x = 158,374,445,372.71
  5. Step 5: Solve for x
    x = 158,374,445,372.71/455,759.61
  6. Step 6: Final answer
    x = 347,495.57

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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.