Home / 426,653.40-639,980.04-127,126.20

Finding the Fourth Proportional to 426,653.40, 639,980.04 and 127,126.20

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Solution

The fourth proportional to 426,653.40, 639,980.04 and 127,126.20 is: 190,689.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,653.40 : 639,980.04 = 127,126.20 : x
  2. Step 2: Convert to fraction form
    426,653.40/639,980.04 = 127,126.20/x
  3. Step 3: Cross multiply
    426,653.40x = 639,980.04 × 127,126.20
  4. Step 4: Simplify right side
    426,653.40x = 81,358,230,561.05
  5. Step 5: Solve for x
    x = 81,358,230,561.05/426,653.40
  6. Step 6: Final answer
    x = 190,689.28

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Similar ratio
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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.