Home / 639,112.92-881,818.56-390,692.16

Finding the Fourth Proportional to 639,112.92, 881,818.56 and 390,692.16

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Solution

The fourth proportional to 639,112.92, 881,818.56 and 390,692.16 is: 539,059.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,112.92 : 881,818.56 = 390,692.16 : x
  2. Step 2: Convert to fraction form
    639,112.92/881,818.56 = 390,692.16/x
  3. Step 3: Cross multiply
    639,112.92x = 881,818.56 × 390,692.16
  4. Step 4: Simplify right side
    639,112.92x = 344,519,597,934.49
  5. Step 5: Solve for x
    x = 344,519,597,934.49/639,112.92
  6. Step 6: Final answer
    x = 539,059.04

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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.