Home / 1,688.21-2,329.65-1,245.95

Finding the Fourth Proportional to 1,688.21, 2,329.65 and 1,245.95

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Solution

The fourth proportional to 1,688.21, 2,329.65 and 1,245.95 is: 1,719.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.21 : 2,329.65 = 1,245.95 : x
  2. Step 2: Convert to fraction form
    1,688.21/2,329.65 = 1,245.95/x
  3. Step 3: Cross multiply
    1,688.21x = 2,329.65 × 1,245.95
  4. Step 4: Simplify right side
    1,688.21x = 2,902,615.77
  5. Step 5: Solve for x
    x = 2,902,615.77/1,688.21
  6. Step 6: Final answer
    x = 1,719.35

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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.