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Finding the Fourth Proportional to 572,128.54, 858,471.55 and 235,270.40

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Solution

The fourth proportional to 572,128.54, 858,471.55 and 235,270.40 is: 353,020.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,128.54 : 858,471.55 = 235,270.40 : x
  2. Step 2: Convert to fraction form
    572,128.54/858,471.55 = 235,270.40/x
  3. Step 3: Cross multiply
    572,128.54x = 858,471.55 × 235,270.40
  4. Step 4: Simplify right side
    572,128.54x = 201,972,940,076.59
  5. Step 5: Solve for x
    x = 201,972,940,076.59/572,128.54
  6. Step 6: Final answer
    x = 353,020.22

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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.