Home / 1,780.45-2,457.18-983.85

Finding the Fourth Proportional to 1,780.45, 2,457.18 and 983.85

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Solution

The fourth proportional to 1,780.45, 2,457.18 and 983.85 is: 1,357.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.45 : 2,457.18 = 983.85 : x
  2. Step 2: Convert to fraction form
    1,780.45/2,457.18 = 983.85/x
  3. Step 3: Cross multiply
    1,780.45x = 2,457.18 × 983.85
  4. Step 4: Simplify right side
    1,780.45x = 2,417,492.85
  5. Step 5: Solve for x
    x = 2,417,492.85/1,780.45
  6. Step 6: Final answer
    x = 1,357.80

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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.