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Finding the Fourth Proportional to 423,513.50, 635,270.25 and 128,025.50

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Solution

The fourth proportional to 423,513.50, 635,270.25 and 128,025.50 is: 192,038.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,513.50 : 635,270.25 = 128,025.50 : x
  2. Step 2: Convert to fraction form
    423,513.50/635,270.25 = 128,025.50/x
  3. Step 3: Cross multiply
    423,513.50x = 635,270.25 × 128,025.50
  4. Step 4: Simplify right side
    423,513.50x = 81,330,791,391.38
  5. Step 5: Solve for x
    x = 81,330,791,391.38/423,513.50
  6. Step 6: Final answer
    x = 192,038.25

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Similar ratio
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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.