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Finding the Fourth Proportional to 1,403.63, 1,936.99 and 774.18

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Solution

The fourth proportional to 1,403.63, 1,936.99 and 774.18 is: 1,068.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.63 : 1,936.99 = 774.18 : x
  2. Step 2: Convert to fraction form
    1,403.63/1,936.99 = 774.18/x
  3. Step 3: Cross multiply
    1,403.63x = 1,936.99 × 774.18
  4. Step 4: Simplify right side
    1,403.63x = 1,499,565.36
  5. Step 5: Solve for x
    x = 1,499,565.36/1,403.63
  6. Step 6: Final answer
    x = 1,068.35

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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.