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Finding the Fourth Proportional to 1,721.94, 2,376.21 and 975.94

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Solution

The fourth proportional to 1,721.94, 2,376.21 and 975.94 is: 1,346.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.94 : 2,376.21 = 975.94 : x
  2. Step 2: Convert to fraction form
    1,721.94/2,376.21 = 975.94/x
  3. Step 3: Cross multiply
    1,721.94x = 2,376.21 × 975.94
  4. Step 4: Simplify right side
    1,721.94x = 2,319,038.39
  5. Step 5: Solve for x
    x = 2,319,038.39/1,721.94
  6. Step 6: Final answer
    x = 1,346.76

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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.