Home / 1,689.86-2,533.56-1,140.68

Finding the Fourth Proportional to 1,689.86, 2,533.56 and 1,140.68

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Solution

The fourth proportional to 1,689.86, 2,533.56 and 1,140.68 is: 1,710.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.86 : 2,533.56 = 1,140.68 : x
  2. Step 2: Convert to fraction form
    1,689.86/2,533.56 = 1,140.68/x
  3. Step 3: Cross multiply
    1,689.86x = 2,533.56 × 1,140.68
  4. Step 4: Simplify right side
    1,689.86x = 2,889,981.22
  5. Step 5: Solve for x
    x = 2,889,981.22/1,689.86
  6. Step 6: Final answer
    x = 1,710.19

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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.