Home / 2,151.90-2,968.74-1,312.47

Finding the Fourth Proportional to 2,151.90, 2,968.74 and 1,312.47

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Solution

The fourth proportional to 2,151.90, 2,968.74 and 1,312.47 is: 1,810.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.90 : 2,968.74 = 1,312.47 : x
  2. Step 2: Convert to fraction form
    2,151.90/2,968.74 = 1,312.47/x
  3. Step 3: Cross multiply
    2,151.90x = 2,968.74 × 1,312.47
  4. Step 4: Simplify right side
    2,151.90x = 3,896,382.19
  5. Step 5: Solve for x
    x = 3,896,382.19/2,151.90
  6. Step 6: Final answer
    x = 1,810.67

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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.