Home / 1,780.23-2,670.56-740.94

Finding the Fourth Proportional to 1,780.23, 2,670.56 and 740.94

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Solution

The fourth proportional to 1,780.23, 2,670.56 and 740.94 is: 1,111.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.23 : 2,670.56 = 740.94 : x
  2. Step 2: Convert to fraction form
    1,780.23/2,670.56 = 740.94/x
  3. Step 3: Cross multiply
    1,780.23x = 2,670.56 × 740.94
  4. Step 4: Simplify right side
    1,780.23x = 1,978,717.95
  5. Step 5: Solve for x
    x = 1,978,717.95/1,780.23
  6. Step 6: Final answer
    x = 1,111.49

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1.5x scale

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.