Home / 2,114.40-2,915.90-1,316.68

Finding the Fourth Proportional to 2,114.40, 2,915.90 and 1,316.68

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Solution

The fourth proportional to 2,114.40, 2,915.90 and 1,316.68 is: 1,815.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,114.40 : 2,915.90 = 1,316.68 : x
  2. Step 2: Convert to fraction form
    2,114.40/2,915.90 = 1,316.68/x
  3. Step 3: Cross multiply
    2,114.40x = 2,915.90 × 1,316.68
  4. Step 4: Simplify right side
    2,114.40x = 3,839,307.21
  5. Step 5: Solve for x
    x = 3,839,307.21/2,114.40
  6. Step 6: Final answer
    x = 1,815.79

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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.