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Finding the Fourth Proportional to 1,717.79, 2,370.89 and 971.75

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Solution

The fourth proportional to 1,717.79, 2,370.89 and 971.75 is: 1,341.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,717.79 : 2,370.89 = 971.75 : x
  2. Step 2: Convert to fraction form
    1,717.79/2,370.89 = 971.75/x
  3. Step 3: Cross multiply
    1,717.79x = 2,370.89 × 971.75
  4. Step 4: Simplify right side
    1,717.79x = 2,303,895.64
  5. Step 5: Solve for x
    x = 2,303,895.64/1,717.79
  6. Step 6: Final answer
    x = 1,341.20

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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.