Home / 1,215.34-1,688.40-1,203.93

Finding the Fourth Proportional to 1,215.34, 1,688.40 and 1,203.93

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Solution

The fourth proportional to 1,215.34, 1,688.40 and 1,203.93 is: 1,672.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.34 : 1,688.40 = 1,203.93 : x
  2. Step 2: Convert to fraction form
    1,215.34/1,688.40 = 1,203.93/x
  3. Step 3: Cross multiply
    1,215.34x = 1,688.40 × 1,203.93
  4. Step 4: Simplify right side
    1,215.34x = 2,032,715.41
  5. Step 5: Solve for x
    x = 2,032,715.41/1,215.34
  6. Step 6: Final answer
    x = 1,672.55

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.