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Finding the Fourth Proportional to 1,265.50, 1,746.40 and 713.50

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Solution

The fourth proportional to 1,265.50, 1,746.40 and 713.50 is: 984.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.50 : 1,746.40 = 713.50 : x
  2. Step 2: Convert to fraction form
    1,265.50/1,746.40 = 713.50/x
  3. Step 3: Cross multiply
    1,265.50x = 1,746.40 × 713.50
  4. Step 4: Simplify right side
    1,265.50x = 1,246,056.40
  5. Step 5: Solve for x
    x = 1,246,056.40/1,265.50
  6. Step 6: Final answer
    x = 984.64

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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.