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Finding the Fourth Proportional to 1,054.62, 1,581.93 and 913.68

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Solution

The fourth proportional to 1,054.62, 1,581.93 and 913.68 is: 1,370.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,054.62 : 1,581.93 = 913.68 : x
  2. Step 2: Convert to fraction form
    1,054.62/1,581.93 = 913.68/x
  3. Step 3: Cross multiply
    1,054.62x = 1,581.93 × 913.68
  4. Step 4: Simplify right side
    1,054.62x = 1,445,377.80
  5. Step 5: Solve for x
    x = 1,445,377.80/1,054.62
  6. Step 6: Final answer
    x = 1,370.52

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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.