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Finding the Fourth Proportional to 1,748.40, 2,412.80 and 962.40

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Solution

The fourth proportional to 1,748.40, 2,412.80 and 962.40 is: 1,328.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,748.40 : 2,412.80 = 962.40 : x
  2. Step 2: Convert to fraction form
    1,748.40/2,412.80 = 962.40/x
  3. Step 3: Cross multiply
    1,748.40x = 2,412.80 × 962.40
  4. Step 4: Simplify right side
    1,748.40x = 2,322,078.72
  5. Step 5: Solve for x
    x = 2,322,078.72/1,748.40
  6. Step 6: Final answer
    x = 1,328.12

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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.