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Finding the Fourth Proportional to 1,376.12, 1,897.63 and 956.95

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Solution

The fourth proportional to 1,376.12, 1,897.63 and 956.95 is: 1,319.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.12 : 1,897.63 = 956.95 : x
  2. Step 2: Convert to fraction form
    1,376.12/1,897.63 = 956.95/x
  3. Step 3: Cross multiply
    1,376.12x = 1,897.63 × 956.95
  4. Step 4: Simplify right side
    1,376.12x = 1,815,929.89
  5. Step 5: Solve for x
    x = 1,815,929.89/1,376.12
  6. Step 6: Final answer
    x = 1,319.60

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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.