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Finding the Fourth Proportional to 1,054.70, 1,457.32 and 868.06

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Solution

The fourth proportional to 1,054.70, 1,457.32 and 868.06 is: 1,199.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,054.70 : 1,457.32 = 868.06 : x
  2. Step 2: Convert to fraction form
    1,054.70/1,457.32 = 868.06/x
  3. Step 3: Cross multiply
    1,054.70x = 1,457.32 × 868.06
  4. Step 4: Simplify right side
    1,054.70x = 1,265,041.20
  5. Step 5: Solve for x
    x = 1,265,041.20/1,054.70
  6. Step 6: Final answer
    x = 1,199.43

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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.