Home / 2,156.48-2,975.98-1,317.08

Finding the Fourth Proportional to 2,156.48, 2,975.98 and 1,317.08

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Solution

The fourth proportional to 2,156.48, 2,975.98 and 1,317.08 is: 1,817.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.48 : 2,975.98 = 1,317.08 : x
  2. Step 2: Convert to fraction form
    2,156.48/2,975.98 = 1,317.08/x
  3. Step 3: Cross multiply
    2,156.48x = 2,975.98 × 1,317.08
  4. Step 4: Simplify right side
    2,156.48x = 3,919,603.74
  5. Step 5: Solve for x
    x = 3,919,603.74/2,156.48
  6. Step 6: Final answer
    x = 1,817.59

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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.