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Finding the Fourth Proportional to 1,275.11, 1,762.86 and 943.01

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Solution

The fourth proportional to 1,275.11, 1,762.86 and 943.01 is: 1,303.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.11 : 1,762.86 = 943.01 : x
  2. Step 2: Convert to fraction form
    1,275.11/1,762.86 = 943.01/x
  3. Step 3: Cross multiply
    1,275.11x = 1,762.86 × 943.01
  4. Step 4: Simplify right side
    1,275.11x = 1,662,385.79
  5. Step 5: Solve for x
    x = 1,662,385.79/1,275.11
  6. Step 6: Final answer
    x = 1,303.72

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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.