Home / 1,680.29-2,319.81-1,113.61

Finding the Fourth Proportional to 1,680.29, 2,319.81 and 1,113.61

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Solution

The fourth proportional to 1,680.29, 2,319.81 and 1,113.61 is: 1,537.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.29 : 2,319.81 = 1,113.61 : x
  2. Step 2: Convert to fraction form
    1,680.29/2,319.81 = 1,113.61/x
  3. Step 3: Cross multiply
    1,680.29x = 2,319.81 × 1,113.61
  4. Step 4: Simplify right side
    1,680.29x = 2,583,363.61
  5. Step 5: Solve for x
    x = 2,583,363.61/1,680.29
  6. Step 6: Final answer
    x = 1,537.45

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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.