Home / 1,438.17-2,157.53-572.55

Finding the Fourth Proportional to 1,438.17, 2,157.53 and 572.55

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Solution

The fourth proportional to 1,438.17, 2,157.53 and 572.55 is: 858.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.17 : 2,157.53 = 572.55 : x
  2. Step 2: Convert to fraction form
    1,438.17/2,157.53 = 572.55/x
  3. Step 3: Cross multiply
    1,438.17x = 2,157.53 × 572.55
  4. Step 4: Simplify right side
    1,438.17x = 1,235,290.94
  5. Step 5: Solve for x
    x = 1,235,290.94/1,438.17
  6. Step 6: Final answer
    x = 858.93

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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.