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Finding the Fourth Proportional to 1,551.99, 2,328.32 and 859.66

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Solution

The fourth proportional to 1,551.99, 2,328.32 and 859.66 is: 1,289.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.99 : 2,328.32 = 859.66 : x
  2. Step 2: Convert to fraction form
    1,551.99/2,328.32 = 859.66/x
  3. Step 3: Cross multiply
    1,551.99x = 2,328.32 × 859.66
  4. Step 4: Simplify right side
    1,551.99x = 2,001,570.58
  5. Step 5: Solve for x
    x = 2,001,570.58/1,551.99
  6. Step 6: Final answer
    x = 1,289.68

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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.