Home / 1,915.46-2,643.01-1,129.40

Finding the Fourth Proportional to 1,915.46, 2,643.01 and 1,129.40

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Solution

The fourth proportional to 1,915.46, 2,643.01 and 1,129.40 is: 1,558.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.46 : 2,643.01 = 1,129.40 : x
  2. Step 2: Convert to fraction form
    1,915.46/2,643.01 = 1,129.40/x
  3. Step 3: Cross multiply
    1,915.46x = 2,643.01 × 1,129.40
  4. Step 4: Simplify right side
    1,915.46x = 2,985,015.49
  5. Step 5: Solve for x
    x = 2,985,015.49/1,915.46
  6. Step 6: Final answer
    x = 1,558.38

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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.