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Finding the Fourth Proportional to 1,661.34, 2,292.55 and 953.21

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Solution

The fourth proportional to 1,661.34, 2,292.55 and 953.21 is: 1,315.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.34 : 2,292.55 = 953.21 : x
  2. Step 2: Convert to fraction form
    1,661.34/2,292.55 = 953.21/x
  3. Step 3: Cross multiply
    1,661.34x = 2,292.55 × 953.21
  4. Step 4: Simplify right side
    1,661.34x = 2,185,270.12
  5. Step 5: Solve for x
    x = 2,185,270.12/1,661.34
  6. Step 6: Final answer
    x = 1,315.37

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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.