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Finding the Fourth Proportional to 1,457.06, 2,187.50 and 764.24

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Solution

The fourth proportional to 1,457.06, 2,187.50 and 764.24 is: 1,147.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,457.06 : 2,187.50 = 764.24 : x
  2. Step 2: Convert to fraction form
    1,457.06/2,187.50 = 764.24/x
  3. Step 3: Cross multiply
    1,457.06x = 2,187.50 × 764.24
  4. Step 4: Simplify right side
    1,457.06x = 1,671,760.24
  5. Step 5: Solve for x
    x = 1,671,760.24/1,457.06
  6. Step 6: Final answer
    x = 1,147.36

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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.