Home / 1,390.21-2,085.40-524.53

Finding the Fourth Proportional to 1,390.21, 2,085.40 and 524.53

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Solution

The fourth proportional to 1,390.21, 2,085.40 and 524.53 is: 786.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.21 : 2,085.40 = 524.53 : x
  2. Step 2: Convert to fraction form
    1,390.21/2,085.40 = 524.53/x
  3. Step 3: Cross multiply
    1,390.21x = 2,085.40 × 524.53
  4. Step 4: Simplify right side
    1,390.21x = 1,093,854.86
  5. Step 5: Solve for x
    x = 1,093,854.86/1,390.21
  6. Step 6: Final answer
    x = 786.83

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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.