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Finding the Fourth Proportional to 328,014.21, 490,224.15 and 239,454.21

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Solution

The fourth proportional to 328,014.21, 490,224.15 and 239,454.21 is: 357,869.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,014.21 : 490,224.15 = 239,454.21 : x
  2. Step 2: Convert to fraction form
    328,014.21/490,224.15 = 239,454.21/x
  3. Step 3: Cross multiply
    328,014.21x = 490,224.15 × 239,454.21
  4. Step 4: Simplify right side
    328,014.21x = 117,386,236,561.17
  5. Step 5: Solve for x
    x = 117,386,236,561.17/328,014.21
  6. Step 6: Final answer
    x = 357,869.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.