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Finding the Fourth Proportional to 448.76, 618.80 and 309.08

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Solution

The fourth proportional to 448.76, 618.80 and 309.08 is: 426.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.76 : 618.80 = 309.08 : x
  2. Step 2: Convert to fraction form
    448.76/618.80 = 309.08/x
  3. Step 3: Cross multiply
    448.76x = 618.80 × 309.08
  4. Step 4: Simplify right side
    448.76x = 191,254.06
  5. Step 5: Solve for x
    x = 191,254.06/448.76
  6. Step 6: Final answer
    x = 426.19

Related Problems

Find fourth proportional to 224.38, 309.40 and 154.54
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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.