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Finding the Fourth Proportional to 456,300.33, 687,530.90 and 378,078.84

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Solution

The fourth proportional to 456,300.33, 687,530.90 and 378,078.84 is: 569,670.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,300.33 : 687,530.90 = 378,078.84 : x
  2. Step 2: Convert to fraction form
    456,300.33/687,530.90 = 378,078.84/x
  3. Step 3: Cross multiply
    456,300.33x = 687,530.90 × 378,078.84
  4. Step 4: Simplify right side
    456,300.33x = 259,940,883,245.76
  5. Step 5: Solve for x
    x = 259,940,883,245.76/456,300.33
  6. Step 6: Final answer
    x = 569,670.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.