Home / 1,721.91-2,376.10-975.70

Finding the Fourth Proportional to 1,721.91, 2,376.10 and 975.70

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Solution

The fourth proportional to 1,721.91, 2,376.10 and 975.70 is: 1,346.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.91 : 2,376.10 = 975.70 : x
  2. Step 2: Convert to fraction form
    1,721.91/2,376.10 = 975.70/x
  3. Step 3: Cross multiply
    1,721.91x = 2,376.10 × 975.70
  4. Step 4: Simplify right side
    1,721.91x = 2,318,360.77
  5. Step 5: Solve for x
    x = 2,318,360.77/1,721.91
  6. Step 6: Final answer
    x = 1,346.39

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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.