Home / 1,214.18-1,676.14-915.55

Finding the Fourth Proportional to 1,214.18, 1,676.14 and 915.55

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Solution

The fourth proportional to 1,214.18, 1,676.14 and 915.55 is: 1,263.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.18 : 1,676.14 = 915.55 : x
  2. Step 2: Convert to fraction form
    1,214.18/1,676.14 = 915.55/x
  3. Step 3: Cross multiply
    1,214.18x = 1,676.14 × 915.55
  4. Step 4: Simplify right side
    1,214.18x = 1,534,589.98
  5. Step 5: Solve for x
    x = 1,534,589.98/1,214.18
  6. Step 6: Final answer
    x = 1,263.89

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1.5x scale

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.