Home / 1,675.96-2,312.76-919.78

Finding the Fourth Proportional to 1,675.96, 2,312.76 and 919.78

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Solution

The fourth proportional to 1,675.96, 2,312.76 and 919.78 is: 1,269.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,675.96 : 2,312.76 = 919.78 : x
  2. Step 2: Convert to fraction form
    1,675.96/2,312.76 = 919.78/x
  3. Step 3: Cross multiply
    1,675.96x = 2,312.76 × 919.78
  4. Step 4: Simplify right side
    1,675.96x = 2,127,230.39
  5. Step 5: Solve for x
    x = 2,127,230.39/1,675.96
  6. Step 6: Final answer
    x = 1,269.26

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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.