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Finding the Fourth Proportional to 429,775.56, 644,663.28 and 134,287.56

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Solution

The fourth proportional to 429,775.56, 644,663.28 and 134,287.56 is: 201,431.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,775.56 : 644,663.28 = 134,287.56 : x
  2. Step 2: Convert to fraction form
    429,775.56/644,663.28 = 134,287.56/x
  3. Step 3: Cross multiply
    429,775.56x = 644,663.28 × 134,287.56
  4. Step 4: Simplify right side
    429,775.56x = 86,570,258,892.80
  5. Step 5: Solve for x
    x = 86,570,258,892.80/429,775.56
  6. Step 6: Final answer
    x = 201,431.32

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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.