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Finding the Fourth Proportional to 1,946.34, 2,920.14 and 776.88

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Solution

The fourth proportional to 1,946.34, 2,920.14 and 776.88 is: 1,165.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.34 : 2,920.14 = 776.88 : x
  2. Step 2: Convert to fraction form
    1,946.34/2,920.14 = 776.88/x
  3. Step 3: Cross multiply
    1,946.34x = 2,920.14 × 776.88
  4. Step 4: Simplify right side
    1,946.34x = 2,268,598.36
  5. Step 5: Solve for x
    x = 2,268,598.36/1,946.34
  6. Step 6: Final answer
    x = 1,165.57

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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.