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Finding the Fourth Proportional to 762.96, 1,053.18 and 448.50

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Solution

The fourth proportional to 762.96, 1,053.18 and 448.50 is: 619.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.96 : 1,053.18 = 448.50 : x
  2. Step 2: Convert to fraction form
    762.96/1,053.18 = 448.50/x
  3. Step 3: Cross multiply
    762.96x = 1,053.18 × 448.50
  4. Step 4: Simplify right side
    762.96x = 472,351.23
  5. Step 5: Solve for x
    x = 472,351.23/762.96
  6. Step 6: Final answer
    x = 619.10

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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.