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Finding the Fourth Proportional to 712,100.21, 982,698.21 and 389,810.52

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Solution

The fourth proportional to 712,100.21, 982,698.21 and 389,810.52 is: 537,938.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,100.21 : 982,698.21 = 389,810.52 : x
  2. Step 2: Convert to fraction form
    712,100.21/982,698.21 = 389,810.52/x
  3. Step 3: Cross multiply
    712,100.21x = 982,698.21 × 389,810.52
  4. Step 4: Simplify right side
    712,100.21x = 383,066,100,243.17
  5. Step 5: Solve for x
    x = 383,066,100,243.17/712,100.21
  6. Step 6: Final answer
    x = 537,938.48

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1.5x scale

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.