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Finding the Fourth Proportional to 1,199.04, 1,653.10 and 915.94

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Solution

The fourth proportional to 1,199.04, 1,653.10 and 915.94 is: 1,262.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.04 : 1,653.10 = 915.94 : x
  2. Step 2: Convert to fraction form
    1,199.04/1,653.10 = 915.94/x
  3. Step 3: Cross multiply
    1,199.04x = 1,653.10 × 915.94
  4. Step 4: Simplify right side
    1,199.04x = 1,514,140.41
  5. Step 5: Solve for x
    x = 1,514,140.41/1,199.04
  6. Step 6: Final answer
    x = 1,262.79

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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.