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Finding the Fourth Proportional to 455,085, 628,017.57 and 253,881

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Solution

The fourth proportional to 455,085, 628,017.57 and 253,881 is: 350,355.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,085 : 628,017.57 = 253,881 : x
  2. Step 2: Convert to fraction form
    455,085/628,017.57 = 253,881/x
  3. Step 3: Cross multiply
    455,085x = 628,017.57 × 253,881
  4. Step 4: Simplify right side
    455,085x = 159,441,728,689.17
  5. Step 5: Solve for x
    x = 159,441,728,689.17/455,085
  6. Step 6: Final answer
    x = 350,355.93

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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.