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Finding the Fourth Proportional to 631,899.54, 872,021.52 and 345,420.90

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Solution

The fourth proportional to 631,899.54, 872,021.52 and 345,420.90 is: 476,680.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,899.54 : 872,021.52 = 345,420.90 : x
  2. Step 2: Convert to fraction form
    631,899.54/872,021.52 = 345,420.90/x
  3. Step 3: Cross multiply
    631,899.54x = 872,021.52 × 345,420.90
  4. Step 4: Simplify right side
    631,899.54x = 301,214,458,257.77
  5. Step 5: Solve for x
    x = 301,214,458,257.77/631,899.54
  6. Step 6: Final answer
    x = 476,680.93

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.