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Finding the Fourth Proportional to 571,428.32, 857,271.65 and 287,255.03

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Solution

The fourth proportional to 571,428.32, 857,271.65 and 287,255.03 is: 430,947.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,428.32 : 857,271.65 = 287,255.03 : x
  2. Step 2: Convert to fraction form
    571,428.32/857,271.65 = 287,255.03/x
  3. Step 3: Cross multiply
    571,428.32x = 857,271.65 × 287,255.03
  4. Step 4: Simplify right side
    571,428.32x = 246,255,587,816.27
  5. Step 5: Solve for x
    x = 246,255,587,816.27/571,428.32
  6. Step 6: Final answer
    x = 430,947.47

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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.