Home / 712,101.21-982,699.59-389,811.52

Finding the Fourth Proportional to 712,101.21, 982,699.59 and 389,811.52

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Solution

The fourth proportional to 712,101.21, 982,699.59 and 389,811.52 is: 537,939.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,101.21 : 982,699.59 = 389,811.52 : x
  2. Step 2: Convert to fraction form
    712,101.21/982,699.59 = 389,811.52/x
  3. Step 3: Cross multiply
    712,101.21x = 982,699.59 × 389,811.52
  4. Step 4: Simplify right side
    712,101.21x = 383,067,620,881.28
  5. Step 5: Solve for x
    x = 383,067,620,881.28/712,101.21
  6. Step 6: Final answer
    x = 537,939.85

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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.