Home / 1,390.45-1,927.60-1,316.47

Finding the Fourth Proportional to 1,390.45, 1,927.60 and 1,316.47

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Solution

The fourth proportional to 1,390.45, 1,927.60 and 1,316.47 is: 1,825.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.45 : 1,927.60 = 1,316.47 : x
  2. Step 2: Convert to fraction form
    1,390.45/1,927.60 = 1,316.47/x
  3. Step 3: Cross multiply
    1,390.45x = 1,927.60 × 1,316.47
  4. Step 4: Simplify right side
    1,390.45x = 2,537,627.57
  5. Step 5: Solve for x
    x = 2,537,627.57/1,390.45
  6. Step 6: Final answer
    x = 1,825.04

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.