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Finding the Fourth Proportional to 1,657.15, 2,486.70 and 617.89

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Solution

The fourth proportional to 1,657.15, 2,486.70 and 617.89 is: 927.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,657.15 : 2,486.70 = 617.89 : x
  2. Step 2: Convert to fraction form
    1,657.15/2,486.70 = 617.89/x
  3. Step 3: Cross multiply
    1,657.15x = 2,486.70 × 617.89
  4. Step 4: Simplify right side
    1,657.15x = 1,536,507.06
  5. Step 5: Solve for x
    x = 1,536,507.06/1,657.15
  6. Step 6: Final answer
    x = 927.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.