Home / 1,243.10-1,860.60-997.40

Finding the Fourth Proportional to 1,243.10, 1,860.60 and 997.40

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Solution

The fourth proportional to 1,243.10, 1,860.60 and 997.40 is: 1,492.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.10 : 1,860.60 = 997.40 : x
  2. Step 2: Convert to fraction form
    1,243.10/1,860.60 = 997.40/x
  3. Step 3: Cross multiply
    1,243.10x = 1,860.60 × 997.40
  4. Step 4: Simplify right side
    1,243.10x = 1,855,762.44
  5. Step 5: Solve for x
    x = 1,855,762.44/1,243.10
  6. Step 6: Final answer
    x = 1,492.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.