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Finding the Fourth Proportional to 1,943.16, 2,915.71 and 955.93

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Solution

The fourth proportional to 1,943.16, 2,915.71 and 955.93 is: 1,434.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,943.16 : 2,915.71 = 955.93 : x
  2. Step 2: Convert to fraction form
    1,943.16/2,915.71 = 955.93/x
  3. Step 3: Cross multiply
    1,943.16x = 2,915.71 × 955.93
  4. Step 4: Simplify right side
    1,943.16x = 2,787,209.76
  5. Step 5: Solve for x
    x = 2,787,209.76/1,943.16
  6. Step 6: Final answer
    x = 1,434.37

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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.