Home / 2,159.63-2,980.55-1,215.77

Finding the Fourth Proportional to 2,159.63, 2,980.55 and 1,215.77

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Solution

The fourth proportional to 2,159.63, 2,980.55 and 1,215.77 is: 1,677.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.63 : 2,980.55 = 1,215.77 : x
  2. Step 2: Convert to fraction form
    2,159.63/2,980.55 = 1,215.77/x
  3. Step 3: Cross multiply
    2,159.63x = 2,980.55 × 1,215.77
  4. Step 4: Simplify right side
    2,159.63x = 3,623,657.19
  5. Step 5: Solve for x
    x = 3,623,657.19/2,159.63
  6. Step 6: Final answer
    x = 1,677.91

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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.