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Finding the Fourth Proportional to 1,665.09, 2,297.75 and 956.45

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Solution

The fourth proportional to 1,665.09, 2,297.75 and 956.45 is: 1,319.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,665.09 : 2,297.75 = 956.45 : x
  2. Step 2: Convert to fraction form
    1,665.09/2,297.75 = 956.45/x
  3. Step 3: Cross multiply
    1,665.09x = 2,297.75 × 956.45
  4. Step 4: Simplify right side
    1,665.09x = 2,197,666.72
  5. Step 5: Solve for x
    x = 2,197,666.72/1,665.09
  6. Step 6: Final answer
    x = 1,319.85

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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.