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Finding the Fourth Proportional to 1,732.34, 2,389.74 and 1,312.76

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Solution

The fourth proportional to 1,732.34, 2,389.74 and 1,312.76 is: 1,810.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,732.34 : 2,389.74 = 1,312.76 : x
  2. Step 2: Convert to fraction form
    1,732.34/2,389.74 = 1,312.76/x
  3. Step 3: Cross multiply
    1,732.34x = 2,389.74 × 1,312.76
  4. Step 4: Simplify right side
    1,732.34x = 3,137,143.13
  5. Step 5: Solve for x
    x = 3,137,143.13/1,732.34
  6. Step 6: Final answer
    x = 1,810.93

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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.