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Finding the Fourth Proportional to 1,265.06, 1,749.04 and 971.30

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Solution

The fourth proportional to 1,265.06, 1,749.04 and 971.30 is: 1,342.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.06 : 1,749.04 = 971.30 : x
  2. Step 2: Convert to fraction form
    1,265.06/1,749.04 = 971.30/x
  3. Step 3: Cross multiply
    1,265.06x = 1,749.04 × 971.30
  4. Step 4: Simplify right side
    1,265.06x = 1,698,831.38
  5. Step 5: Solve for x
    x = 1,698,831.38/1,265.06
  6. Step 6: Final answer
    x = 1,342.89

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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.