Home / 426,006.40-639,009.60-405,270.40

Finding the Fourth Proportional to 426,006.40, 639,009.60 and 405,270.40

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Solution

The fourth proportional to 426,006.40, 639,009.60 and 405,270.40 is: 607,905.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,006.40 : 639,009.60 = 405,270.40 : x
  2. Step 2: Convert to fraction form
    426,006.40/639,009.60 = 405,270.40/x
  3. Step 3: Cross multiply
    426,006.40x = 639,009.60 × 405,270.40
  4. Step 4: Simplify right side
    426,006.40x = 258,971,676,195.84
  5. Step 5: Solve for x
    x = 258,971,676,195.84/426,006.40
  6. Step 6: Final answer
    x = 607,905.60

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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.