Home / 1,678.89-2,316.87-932.85

Finding the Fourth Proportional to 1,678.89, 2,316.87 and 932.85

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Solution

The fourth proportional to 1,678.89, 2,316.87 and 932.85 is: 1,287.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.89 : 2,316.87 = 932.85 : x
  2. Step 2: Convert to fraction form
    1,678.89/2,316.87 = 932.85/x
  3. Step 3: Cross multiply
    1,678.89x = 2,316.87 × 932.85
  4. Step 4: Simplify right side
    1,678.89x = 2,161,300.08
  5. Step 5: Solve for x
    x = 2,161,300.08/1,678.89
  6. Step 6: Final answer
    x = 1,287.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.