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Finding the Fourth Proportional to 425,824.66, 638,628 and 126,235.18

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Solution

The fourth proportional to 425,824.66, 638,628 and 126,235.18 is: 189,320.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,824.66 : 638,628 = 126,235.18 : x
  2. Step 2: Convert to fraction form
    425,824.66/638,628 = 126,235.18/x
  3. Step 3: Cross multiply
    425,824.66x = 638,628 × 126,235.18
  4. Step 4: Simplify right side
    425,824.66x = 80,617,320,533.04
  5. Step 5: Solve for x
    x = 80,617,320,533.04/425,824.66
  6. Step 6: Final answer
    x = 189,320.46

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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.