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Finding the Fourth Proportional to 1,235.70, 1,703.16 and 968.40

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Solution

The fourth proportional to 1,235.70, 1,703.16 and 968.40 is: 1,334.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.70 : 1,703.16 = 968.40 : x
  2. Step 2: Convert to fraction form
    1,235.70/1,703.16 = 968.40/x
  3. Step 3: Cross multiply
    1,235.70x = 1,703.16 × 968.40
  4. Step 4: Simplify right side
    1,235.70x = 1,649,340.14
  5. Step 5: Solve for x
    x = 1,649,340.14/1,235.70
  6. Step 6: Final answer
    x = 1,334.74

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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.