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Finding the Fourth Proportional to 288,028.34, 432,042.56 and 77,666.28

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Solution

The fourth proportional to 288,028.34, 432,042.56 and 77,666.28 is: 116,499.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,028.34 : 432,042.56 = 77,666.28 : x
  2. Step 2: Convert to fraction form
    288,028.34/432,042.56 = 77,666.28/x
  3. Step 3: Cross multiply
    288,028.34x = 432,042.56 × 77,666.28
  4. Step 4: Simplify right side
    288,028.34x = 33,555,138,436.88
  5. Step 5: Solve for x
    x = 33,555,138,436.88/288,028.34
  6. Step 6: Final answer
    x = 116,499.43

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1.5x scale

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.