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Finding the Fourth Proportional to 455,515.39, 628,688.15 and 264,639.50

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Solution

The fourth proportional to 455,515.39, 628,688.15 and 264,639.50 is: 365,247.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,515.39 : 628,688.15 = 264,639.50 : x
  2. Step 2: Convert to fraction form
    455,515.39/628,688.15 = 264,639.50/x
  3. Step 3: Cross multiply
    455,515.39x = 628,688.15 × 264,639.50
  4. Step 4: Simplify right side
    455,515.39x = 166,375,717,671.93
  5. Step 5: Solve for x
    x = 166,375,717,671.93/455,515.39
  6. Step 6: Final answer
    x = 365,247.19

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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.