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Finding the Fourth Proportional to 628,627.82, 867,813.93 and 421,822.22

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Solution

The fourth proportional to 628,627.82, 867,813.93 and 421,822.22 is: 582,321.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,627.82 : 867,813.93 = 421,822.22 : x
  2. Step 2: Convert to fraction form
    628,627.82/867,813.93 = 421,822.22/x
  3. Step 3: Cross multiply
    628,627.82x = 867,813.93 × 421,822.22
  4. Step 4: Simplify right side
    628,627.82x = 366,063,194,160.46
  5. Step 5: Solve for x
    x = 366,063,194,160.46/628,627.82
  6. Step 6: Final answer
    x = 582,321.02

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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.