Home / 648,437.20-972,072.60-423,905.20

Finding the Fourth Proportional to 648,437.20, 972,072.60 and 423,905.20

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Solution

The fourth proportional to 648,437.20, 972,072.60 and 423,905.20 is: 635,476.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,437.20 : 972,072.60 = 423,905.20 : x
  2. Step 2: Convert to fraction form
    648,437.20/972,072.60 = 423,905.20/x
  3. Step 3: Cross multiply
    648,437.20x = 972,072.60 × 423,905.20
  4. Step 4: Simplify right side
    648,437.20x = 412,066,629,917.52
  5. Step 5: Solve for x
    x = 412,066,629,917.52/648,437.20
  6. Step 6: Final answer
    x = 635,476.54

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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.