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Finding the Fourth Proportional to 426,376.83, 639,506.93 and 126,903.63

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Solution

The fourth proportional to 426,376.83, 639,506.93 and 126,903.63 is: 190,338.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,376.83 : 639,506.93 = 126,903.63 : x
  2. Step 2: Convert to fraction form
    426,376.83/639,506.93 = 126,903.63/x
  3. Step 3: Cross multiply
    426,376.83x = 639,506.93 × 126,903.63
  4. Step 4: Simplify right side
    426,376.83x = 81,155,750,192.64
  5. Step 5: Solve for x
    x = 81,155,750,192.64/426,376.83
  6. Step 6: Final answer
    x = 190,338.09

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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.