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Finding the Fourth Proportional to 1,078.48, 1,618.85 and 955.87

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Solution

The fourth proportional to 1,078.48, 1,618.85 and 955.87 is: 1,434.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078.48 : 1,618.85 = 955.87 : x
  2. Step 2: Convert to fraction form
    1,078.48/1,618.85 = 955.87/x
  3. Step 3: Cross multiply
    1,078.48x = 1,618.85 × 955.87
  4. Step 4: Simplify right side
    1,078.48x = 1,547,408.49
  5. Step 5: Solve for x
    x = 1,547,408.49/1,078.48
  6. Step 6: Final answer
    x = 1,434.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.