Home / 1,575.12-2,351-1,390.60

Finding the Fourth Proportional to 1,575.12, 2,351 and 1,390.60

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Solution

The fourth proportional to 1,575.12, 2,351 and 1,390.60 is: 2,075.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.12 : 2,351 = 1,390.60 : x
  2. Step 2: Convert to fraction form
    1,575.12/2,351 = 1,390.60/x
  3. Step 3: Cross multiply
    1,575.12x = 2,351 × 1,390.60
  4. Step 4: Simplify right side
    1,575.12x = 3,269,300.60
  5. Step 5: Solve for x
    x = 3,269,300.60/1,575.12
  6. Step 6: Final answer
    x = 2,075.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.