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Finding the Fourth Proportional to 288,090.40, 432,135.60 and 188,363.20

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Solution

The fourth proportional to 288,090.40, 432,135.60 and 188,363.20 is: 282,544.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,090.40 : 432,135.60 = 188,363.20 : x
  2. Step 2: Convert to fraction form
    288,090.40/432,135.60 = 188,363.20/x
  3. Step 3: Cross multiply
    288,090.40x = 432,135.60 × 188,363.20
  4. Step 4: Simplify right side
    288,090.40x = 81,398,444,449.92
  5. Step 5: Solve for x
    x = 81,398,444,449.92/288,090.40
  6. Step 6: Final answer
    x = 282,544.80

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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.