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Finding the Fourth Proportional to 328,479.57, 492,719.36 and 128,893.95

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Solution

The fourth proportional to 328,479.57, 492,719.36 and 128,893.95 is: 193,340.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,479.57 : 492,719.36 = 128,893.95 : x
  2. Step 2: Convert to fraction form
    328,479.57/492,719.36 = 128,893.95/x
  3. Step 3: Cross multiply
    328,479.57x = 492,719.36 × 128,893.95
  4. Step 4: Simplify right side
    328,479.57x = 63,508,543,907.40
  5. Step 5: Solve for x
    x = 63,508,543,907.40/328,479.57
  6. Step 6: Final answer
    x = 193,340.93

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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.