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Finding the Fourth Proportional to 1,946.69, 2,920.35 and 776.69

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Solution

The fourth proportional to 1,946.69, 2,920.35 and 776.69 is: 1,165.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.69 : 2,920.35 = 776.69 : x
  2. Step 2: Convert to fraction form
    1,946.69/2,920.35 = 776.69/x
  3. Step 3: Cross multiply
    1,946.69x = 2,920.35 × 776.69
  4. Step 4: Simplify right side
    1,946.69x = 2,268,213.94
  5. Step 5: Solve for x
    x = 2,268,213.94/1,946.69
  6. Step 6: Final answer
    x = 1,165.16

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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.