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Finding the Fourth Proportional to 1,315.84, 1,817.93 and 1,002.17

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Solution

The fourth proportional to 1,315.84, 1,817.93 and 1,002.17 is: 1,384.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.84 : 1,817.93 = 1,002.17 : x
  2. Step 2: Convert to fraction form
    1,315.84/1,817.93 = 1,002.17/x
  3. Step 3: Cross multiply
    1,315.84x = 1,817.93 × 1,002.17
  4. Step 4: Simplify right side
    1,315.84x = 1,821,860.81
  5. Step 5: Solve for x
    x = 1,821,860.81/1,315.84
  6. Step 6: Final answer
    x = 1,384.56

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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.