Home / 639,104.40-957,490.20-520,131.60

Finding the Fourth Proportional to 639,104.40, 957,490.20 and 520,131.60

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Solution

The fourth proportional to 639,104.40, 957,490.20 and 520,131.60 is: 779,248.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,104.40 : 957,490.20 = 520,131.60 : x
  2. Step 2: Convert to fraction form
    639,104.40/957,490.20 = 520,131.60/x
  3. Step 3: Cross multiply
    639,104.40x = 957,490.20 × 520,131.60
  4. Step 4: Simplify right side
    639,104.40x = 498,020,909,710.32
  5. Step 5: Solve for x
    x = 498,020,909,710.32/639,104.40
  6. Step 6: Final answer
    x = 779,248.13

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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.