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Finding the Fourth Proportional to 448,680.96, 618,454.36 and 390,388.80

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Solution

The fourth proportional to 448,680.96, 618,454.36 and 390,388.80 is: 538,105.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,680.96 : 618,454.36 = 390,388.80 : x
  2. Step 2: Convert to fraction form
    448,680.96/618,454.36 = 390,388.80/x
  3. Step 3: Cross multiply
    448,680.96x = 618,454.36 × 390,388.80
  4. Step 4: Simplify right side
    448,680.96x = 241,437,655,455.17
  5. Step 5: Solve for x
    x = 241,437,655,455.17/448,680.96
  6. Step 6: Final answer
    x = 538,105.42

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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.