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Finding the Fourth Proportional to 1,628.40, 2,443.86 and 655.32

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Solution

The fourth proportional to 1,628.40, 2,443.86 and 655.32 is: 983.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.40 : 2,443.86 = 655.32 : x
  2. Step 2: Convert to fraction form
    1,628.40/2,443.86 = 655.32/x
  3. Step 3: Cross multiply
    1,628.40x = 2,443.86 × 655.32
  4. Step 4: Simplify right side
    1,628.40x = 1,601,510.34
  5. Step 5: Solve for x
    x = 1,601,510.34/1,628.40
  6. Step 6: Final answer
    x = 983.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.