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Finding the Fourth Proportional to 425,671, 638,606.74 and 126,154.06

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Solution

The fourth proportional to 425,671, 638,606.74 and 126,154.06 is: 189,260.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,671 : 638,606.74 = 126,154.06 : x
  2. Step 2: Convert to fraction form
    425,671/638,606.74 = 126,154.06/x
  3. Step 3: Cross multiply
    425,671x = 638,606.74 × 126,154.06
  4. Step 4: Simplify right side
    425,671x = 80,562,832,994.36
  5. Step 5: Solve for x
    x = 80,562,832,994.36/425,671
  6. Step 6: Final answer
    x = 189,260.80

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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.