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Finding the Fourth Proportional to 903.16, 1,247.16 and 695.40

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Solution

The fourth proportional to 903.16, 1,247.16 and 695.40 is: 960.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.16 : 1,247.16 = 695.40 : x
  2. Step 2: Convert to fraction form
    903.16/1,247.16 = 695.40/x
  3. Step 3: Cross multiply
    903.16x = 1,247.16 × 695.40
  4. Step 4: Simplify right side
    903.16x = 867,275.06
  5. Step 5: Solve for x
    x = 867,275.06/903.16
  6. Step 6: Final answer
    x = 960.27

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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.