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Finding the Fourth Proportional to 1,888, 2,832 and 520

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Solution

The fourth proportional to 1,888, 2,832 and 520 is: 780

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,888 : 2,832 = 520 : x
  2. Step 2: Convert to fraction form
    1,888/2,832 = 520/x
  3. Step 3: Cross multiply
    1,888x = 2,832 × 520
  4. Step 4: Simplify right side
    1,888x = 1,472,640
  5. Step 5: Solve for x
    x = 1,472,640/1,888
  6. Step 6: Final answer
    x = 780

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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.