Home / 1,215.04-1,671.88-1,178.60

Finding the Fourth Proportional to 1,215.04, 1,671.88 and 1,178.60

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Solution

The fourth proportional to 1,215.04, 1,671.88 and 1,178.60 is: 1,621.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.04 : 1,671.88 = 1,178.60 : x
  2. Step 2: Convert to fraction form
    1,215.04/1,671.88 = 1,178.60/x
  3. Step 3: Cross multiply
    1,215.04x = 1,671.88 × 1,178.60
  4. Step 4: Simplify right side
    1,215.04x = 1,970,477.77
  5. Step 5: Solve for x
    x = 1,970,477.77/1,215.04
  6. Step 6: Final answer
    x = 1,621.74

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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.