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Finding the Fourth Proportional to 643,271.63, 887,133.67 and 401,576.54

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Solution

The fourth proportional to 643,271.63, 887,133.67 and 401,576.54 is: 553,812.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,271.63 : 887,133.67 = 401,576.54 : x
  2. Step 2: Convert to fraction form
    643,271.63/887,133.67 = 401,576.54/x
  3. Step 3: Cross multiply
    643,271.63x = 887,133.67 × 401,576.54
  4. Step 4: Simplify right side
    643,271.63x = 356,252,064,276.49
  5. Step 5: Solve for x
    x = 356,252,064,276.49/643,271.63
  6. Step 6: Final answer
    x = 553,812.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.