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Finding the Fourth Proportional to 1,417.96, 1,956.85 and 788.49

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Solution

The fourth proportional to 1,417.96, 1,956.85 and 788.49 is: 1,088.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.96 : 1,956.85 = 788.49 : x
  2. Step 2: Convert to fraction form
    1,417.96/1,956.85 = 788.49/x
  3. Step 3: Cross multiply
    1,417.96x = 1,956.85 × 788.49
  4. Step 4: Simplify right side
    1,417.96x = 1,542,956.66
  5. Step 5: Solve for x
    x = 1,542,956.66/1,417.96
  6. Step 6: Final answer
    x = 1,088.15

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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.