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Finding the Fourth Proportional to 571,528.78, 857,183.87 and 287,140.52

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Solution

The fourth proportional to 571,528.78, 857,183.87 and 287,140.52 is: 430,655.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,528.78 : 857,183.87 = 287,140.52 : x
  2. Step 2: Convert to fraction form
    571,528.78/857,183.87 = 287,140.52/x
  3. Step 3: Cross multiply
    571,528.78x = 857,183.87 × 287,140.52
  4. Step 4: Simplify right side
    571,528.78x = 246,132,225,028.22
  5. Step 5: Solve for x
    x = 246,132,225,028.22/571,528.78
  6. Step 6: Final answer
    x = 430,655.87

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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.