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Finding the Fourth Proportional to 425,261.48, 638,287.50 and 215,050.28

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Solution

The fourth proportional to 425,261.48, 638,287.50 and 215,050.28 is: 322,775.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,261.48 : 638,287.50 = 215,050.28 : x
  2. Step 2: Convert to fraction form
    425,261.48/638,287.50 = 215,050.28/x
  3. Step 3: Cross multiply
    425,261.48x = 638,287.50 × 215,050.28
  4. Step 4: Simplify right side
    425,261.48x = 137,263,905,595.50
  5. Step 5: Solve for x
    x = 137,263,905,595.50/425,261.48
  6. Step 6: Final answer
    x = 322,775.31

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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.