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Finding the Fourth Proportional to 1,756.66, 2,424.09 and 970.78

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Solution

The fourth proportional to 1,756.66, 2,424.09 and 970.78 is: 1,339.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,756.66 : 2,424.09 = 970.78 : x
  2. Step 2: Convert to fraction form
    1,756.66/2,424.09 = 970.78/x
  3. Step 3: Cross multiply
    1,756.66x = 2,424.09 × 970.78
  4. Step 4: Simplify right side
    1,756.66x = 2,353,258.09
  5. Step 5: Solve for x
    x = 2,353,258.09/1,756.66
  6. Step 6: Final answer
    x = 1,339.62

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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.