Home / 1,045.45-1,442.12-921.41

Finding the Fourth Proportional to 1,045.45, 1,442.12 and 921.41

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Solution

The fourth proportional to 1,045.45, 1,442.12 and 921.41 is: 1,271.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,045.45 : 1,442.12 = 921.41 : x
  2. Step 2: Convert to fraction form
    1,045.45/1,442.12 = 921.41/x
  3. Step 3: Cross multiply
    1,045.45x = 1,442.12 × 921.41
  4. Step 4: Simplify right side
    1,045.45x = 1,328,783.79
  5. Step 5: Solve for x
    x = 1,328,783.79/1,045.45
  6. Step 6: Final answer
    x = 1,271.02

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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.