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Finding the Fourth Proportional to 328,295.30, 492,078.45 and 128,549.30

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Solution

The fourth proportional to 328,295.30, 492,078.45 and 128,549.30 is: 192,681.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,295.30 : 492,078.45 = 128,549.30 : x
  2. Step 2: Convert to fraction form
    328,295.30/492,078.45 = 128,549.30/x
  3. Step 3: Cross multiply
    328,295.30x = 492,078.45 × 128,549.30
  4. Step 4: Simplify right side
    328,295.30x = 63,256,340,292.59
  5. Step 5: Solve for x
    x = 63,256,340,292.59/328,295.30
  6. Step 6: Final answer
    x = 192,681.22

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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.