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Finding the Fourth Proportional to 628,441.60, 942,649.64 and 155,131.06

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Solution

The fourth proportional to 628,441.60, 942,649.64 and 155,131.06 is: 232,693.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,441.60 : 942,649.64 = 155,131.06 : x
  2. Step 2: Convert to fraction form
    628,441.60/942,649.64 = 155,131.06/x
  3. Step 3: Cross multiply
    628,441.60x = 942,649.64 × 155,131.06
  4. Step 4: Simplify right side
    628,441.60x = 146,234,237,861.82
  5. Step 5: Solve for x
    x = 146,234,237,861.82/628,441.60
  6. Step 6: Final answer
    x = 232,693.44

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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.