Home / 1,915.02-2,642.40-1,129.32

Finding the Fourth Proportional to 1,915.02, 2,642.40 and 1,129.32

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Solution

The fourth proportional to 1,915.02, 2,642.40 and 1,129.32 is: 1,558.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.02 : 2,642.40 = 1,129.32 : x
  2. Step 2: Convert to fraction form
    1,915.02/2,642.40 = 1,129.32/x
  3. Step 3: Cross multiply
    1,915.02x = 2,642.40 × 1,129.32
  4. Step 4: Simplify right side
    1,915.02x = 2,984,115.17
  5. Step 5: Solve for x
    x = 2,984,115.17/1,915.02
  6. Step 6: Final answer
    x = 1,558.27

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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.