Home / 425,936.84-638,962.86-145,378.76

Finding the Fourth Proportional to 425,936.84, 638,962.86 and 145,378.76

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Solution

The fourth proportional to 425,936.84, 638,962.86 and 145,378.76 is: 218,087.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,936.84 : 638,962.86 = 145,378.76 : x
  2. Step 2: Convert to fraction form
    425,936.84/638,962.86 = 145,378.76/x
  3. Step 3: Cross multiply
    425,936.84x = 638,962.86 × 145,378.76
  4. Step 4: Simplify right side
    425,936.84x = 92,891,628,272.85
  5. Step 5: Solve for x
    x = 92,891,628,272.85/425,936.84
  6. Step 6: Final answer
    x = 218,087.80

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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.