Home / 1,653.17-2,280.95-989.55

Finding the Fourth Proportional to 1,653.17, 2,280.95 and 989.55

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Solution

The fourth proportional to 1,653.17, 2,280.95 and 989.55 is: 1,365.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,653.17 : 2,280.95 = 989.55 : x
  2. Step 2: Convert to fraction form
    1,653.17/2,280.95 = 989.55/x
  3. Step 3: Cross multiply
    1,653.17x = 2,280.95 × 989.55
  4. Step 4: Simplify right side
    1,653.17x = 2,257,127.33
  5. Step 5: Solve for x
    x = 2,257,127.33/1,653.17
  6. Step 6: Final answer
    x = 1,365.33

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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.