Home / 1,680.78-2,319.73-1,210.23

Finding the Fourth Proportional to 1,680.78, 2,319.73 and 1,210.23

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Solution

The fourth proportional to 1,680.78, 2,319.73 and 1,210.23 is: 1,670.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.78 : 2,319.73 = 1,210.23 : x
  2. Step 2: Convert to fraction form
    1,680.78/2,319.73 = 1,210.23/x
  3. Step 3: Cross multiply
    1,680.78x = 2,319.73 × 1,210.23
  4. Step 4: Simplify right side
    1,680.78x = 2,807,406.84
  5. Step 5: Solve for x
    x = 2,807,406.84/1,680.78
  6. Step 6: Final answer
    x = 1,670.30

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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.