Home / 1,563.18-2,157.23-864.57

Finding the Fourth Proportional to 1,563.18, 2,157.23 and 864.57

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Solution

The fourth proportional to 1,563.18, 2,157.23 and 864.57 is: 1,193.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.18 : 2,157.23 = 864.57 : x
  2. Step 2: Convert to fraction form
    1,563.18/2,157.23 = 864.57/x
  3. Step 3: Cross multiply
    1,563.18x = 2,157.23 × 864.57
  4. Step 4: Simplify right side
    1,563.18x = 1,865,072.02
  5. Step 5: Solve for x
    x = 1,865,072.02/1,563.18
  6. Step 6: Final answer
    x = 1,193.13

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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.