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Finding the Fourth Proportional to 647,628.80, 971,020.80 and 581,273.60

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Solution

The fourth proportional to 647,628.80, 971,020.80 and 581,273.60 is: 871,531.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,628.80 : 971,020.80 = 581,273.60 : x
  2. Step 2: Convert to fraction form
    647,628.80/971,020.80 = 581,273.60/x
  3. Step 3: Cross multiply
    647,628.80x = 971,020.80 × 581,273.60
  4. Step 4: Simplify right side
    647,628.80x = 564,428,756,090.88
  5. Step 5: Solve for x
    x = 564,428,756,090.88/647,628.80
  6. Step 6: Final answer
    x = 871,531.28

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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.