Home / 639,587.60-958,117.80-415,104.20

Finding the Fourth Proportional to 639,587.60, 958,117.80 and 415,104.20

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Solution

The fourth proportional to 639,587.60, 958,117.80 and 415,104.20 is: 621,836.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,587.60 : 958,117.80 = 415,104.20 : x
  2. Step 2: Convert to fraction form
    639,587.60/958,117.80 = 415,104.20/x
  3. Step 3: Cross multiply
    639,587.60x = 958,117.80 × 415,104.20
  4. Step 4: Simplify right side
    639,587.60x = 397,718,722,874.76
  5. Step 5: Solve for x
    x = 397,718,722,874.76/639,587.60
  6. Step 6: Final answer
    x = 621,836.20

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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.