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Finding the Fourth Proportional to 1,675.75, 2,312.81 and 976.99

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Solution

The fourth proportional to 1,675.75, 2,312.81 and 976.99 is: 1,348.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,675.75 : 2,312.81 = 976.99 : x
  2. Step 2: Convert to fraction form
    1,675.75/2,312.81 = 976.99/x
  3. Step 3: Cross multiply
    1,675.75x = 2,312.81 × 976.99
  4. Step 4: Simplify right side
    1,675.75x = 2,259,587.36
  5. Step 5: Solve for x
    x = 2,259,587.36/1,675.75
  6. Step 6: Final answer
    x = 1,348.40

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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.