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Finding the Fourth Proportional to 1,056.65, 1,454.96 and 936.90

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Solution

The fourth proportional to 1,056.65, 1,454.96 and 936.90 is: 1,290.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,056.65 : 1,454.96 = 936.90 : x
  2. Step 2: Convert to fraction form
    1,056.65/1,454.96 = 936.90/x
  3. Step 3: Cross multiply
    1,056.65x = 1,454.96 × 936.90
  4. Step 4: Simplify right side
    1,056.65x = 1,363,154.37
  5. Step 5: Solve for x
    x = 1,363,154.37/1,056.65
  6. Step 6: Final answer
    x = 1,290.08

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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.