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Finding the Fourth Proportional to 1,416.99, 2,126.70 and 551.91

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Solution

The fourth proportional to 1,416.99, 2,126.70 and 551.91 is: 828.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,416.99 : 2,126.70 = 551.91 : x
  2. Step 2: Convert to fraction form
    1,416.99/2,126.70 = 551.91/x
  3. Step 3: Cross multiply
    1,416.99x = 2,126.70 × 551.91
  4. Step 4: Simplify right side
    1,416.99x = 1,173,747.00
  5. Step 5: Solve for x
    x = 1,173,747.00/1,416.99
  6. Step 6: Final answer
    x = 828.34

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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.