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Finding the Fourth Proportional to 328,415.14, 492,424.71 and 128,496.82

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Solution

The fourth proportional to 328,415.14, 492,424.71 and 128,496.82 is: 192,667.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,415.14 : 492,424.71 = 128,496.82 : x
  2. Step 2: Convert to fraction form
    328,415.14/492,424.71 = 128,496.82/x
  3. Step 3: Cross multiply
    328,415.14x = 492,424.71 × 128,496.82
  4. Step 4: Simplify right side
    328,415.14x = 63,275,009,324.42
  5. Step 5: Solve for x
    x = 63,275,009,324.42/328,415.14
  6. Step 6: Final answer
    x = 192,667.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.