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Finding the Fourth Proportional to 1,588, 2,184.15 and 1,391.17

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Solution

The fourth proportional to 1,588, 2,184.15 and 1,391.17 is: 1,913.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,588 : 2,184.15 = 1,391.17 : x
  2. Step 2: Convert to fraction form
    1,588/2,184.15 = 1,391.17/x
  3. Step 3: Cross multiply
    1,588x = 2,184.15 × 1,391.17
  4. Step 4: Simplify right side
    1,588x = 3,038,523.96
  5. Step 5: Solve for x
    x = 3,038,523.96/1,588
  6. Step 6: Final answer
    x = 1,913.43

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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.