Home / 639,826.80-960,071.40-261,025.20

Finding the Fourth Proportional to 639,826.80, 960,071.40 and 261,025.20

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Solution

The fourth proportional to 639,826.80, 960,071.40 and 261,025.20 is: 391,672.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,826.80 : 960,071.40 = 261,025.20 : x
  2. Step 2: Convert to fraction form
    639,826.80/960,071.40 = 261,025.20/x
  3. Step 3: Cross multiply
    639,826.80x = 960,071.40 × 261,025.20
  4. Step 4: Simplify right side
    639,826.80x = 250,602,829,199.28
  5. Step 5: Solve for x
    x = 250,602,829,199.28/639,826.80
  6. Step 6: Final answer
    x = 391,672.92

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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.