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Finding the Fourth Proportional to 1,619.78, 2,235.67 and 956.93

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Solution

The fourth proportional to 1,619.78, 2,235.67 and 956.93 is: 1,320.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619.78 : 2,235.67 = 956.93 : x
  2. Step 2: Convert to fraction form
    1,619.78/2,235.67 = 956.93/x
  3. Step 3: Cross multiply
    1,619.78x = 2,235.67 × 956.93
  4. Step 4: Simplify right side
    1,619.78x = 2,139,366.12
  5. Step 5: Solve for x
    x = 2,139,366.12/1,619.78
  6. Step 6: Final answer
    x = 1,320.78

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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.