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Finding the Fourth Proportional to 762.60, 1,052.40 and 448.06

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Solution

The fourth proportional to 762.60, 1,052.40 and 448.06 is: 618.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.60 : 1,052.40 = 448.06 : x
  2. Step 2: Convert to fraction form
    762.60/1,052.40 = 448.06/x
  3. Step 3: Cross multiply
    762.60x = 1,052.40 × 448.06
  4. Step 4: Simplify right side
    762.60x = 471,538.34
  5. Step 5: Solve for x
    x = 471,538.34/762.60
  6. Step 6: Final answer
    x = 618.33

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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.