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Finding the Fourth Proportional to 1,559.84, 2,339.12 and 779.55

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Solution

The fourth proportional to 1,559.84, 2,339.12 and 779.55 is: 1,169.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,559.84 : 2,339.12 = 779.55 : x
  2. Step 2: Convert to fraction form
    1,559.84/2,339.12 = 779.55/x
  3. Step 3: Cross multiply
    1,559.84x = 2,339.12 × 779.55
  4. Step 4: Simplify right side
    1,559.84x = 1,823,457.10
  5. Step 5: Solve for x
    x = 1,823,457.10/1,559.84
  6. Step 6: Final answer
    x = 1,169.01

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Double scale
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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.