Home / 678,087.72-1,017,461.88-278,848.44

Finding the Fourth Proportional to 678,087.72, 1,017,461.88 and 278,848.44

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Solution

The fourth proportional to 678,087.72, 1,017,461.88 and 278,848.44 is: 418,408.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,087.72 : 1,017,461.88 = 278,848.44 : x
  2. Step 2: Convert to fraction form
    678,087.72/1,017,461.88 = 278,848.44/x
  3. Step 3: Cross multiply
    678,087.72x = 1,017,461.88 × 278,848.44
  4. Step 4: Simplify right side
    678,087.72x = 283,717,657,997.47
  5. Step 5: Solve for x
    x = 283,717,657,997.47/678,087.72
  6. Step 6: Final answer
    x = 418,408.49

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Double scale
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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.