Home / 638,443.70-955,822.35-389,611.70

Finding the Fourth Proportional to 638,443.70, 955,822.35 and 389,611.70

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Solution

The fourth proportional to 638,443.70, 955,822.35 and 389,611.70 is: 583,292.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,443.70 : 955,822.35 = 389,611.70 : x
  2. Step 2: Convert to fraction form
    638,443.70/955,822.35 = 389,611.70/x
  3. Step 3: Cross multiply
    638,443.70x = 955,822.35 × 389,611.70
  4. Step 4: Simplify right side
    638,443.70x = 372,399,570,681.50
  5. Step 5: Solve for x
    x = 372,399,570,681.50/638,443.70
  6. Step 6: Final answer
    x = 583,292.73

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1.5x scale

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.