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Finding the Fourth Proportional to 1,196.70, 1,652.97 and 915.22

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Solution

The fourth proportional to 1,196.70, 1,652.97 and 915.22 is: 1,264.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,196.70 : 1,652.97 = 915.22 : x
  2. Step 2: Convert to fraction form
    1,196.70/1,652.97 = 915.22/x
  3. Step 3: Cross multiply
    1,196.70x = 1,652.97 × 915.22
  4. Step 4: Simplify right side
    1,196.70x = 1,512,831.20
  5. Step 5: Solve for x
    x = 1,512,831.20/1,196.70
  6. Step 6: Final answer
    x = 1,264.17

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1.5x scale

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.