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Finding the Fourth Proportional to 423,907.40, 635,666.70 and 187,128.20

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Solution

The fourth proportional to 423,907.40, 635,666.70 and 187,128.20 is: 280,606.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,907.40 : 635,666.70 = 187,128.20 : x
  2. Step 2: Convert to fraction form
    423,907.40/635,666.70 = 187,128.20/x
  3. Step 3: Cross multiply
    423,907.40x = 635,666.70 × 187,128.20
  4. Step 4: Simplify right side
    423,907.40x = 118,951,165,370.94
  5. Step 5: Solve for x
    x = 118,951,165,370.94/423,907.40
  6. Step 6: Final answer
    x = 280,606.48

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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.