Home / 215,015.07-320,708.53-186,712.55

Finding the Fourth Proportional to 215,015.07, 320,708.53 and 186,712.55

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Solution

The fourth proportional to 215,015.07, 320,708.53 and 186,712.55 is: 278,493.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,015.07 : 320,708.53 = 186,712.55 : x
  2. Step 2: Convert to fraction form
    215,015.07/320,708.53 = 186,712.55/x
  3. Step 3: Cross multiply
    215,015.07x = 320,708.53 × 186,712.55
  4. Step 4: Simplify right side
    215,015.07x = 59,880,307,443.05
  5. Step 5: Solve for x
    x = 59,880,307,443.05/215,015.07
  6. Step 6: Final answer
    x = 278,493.54

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1.5x scale

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.