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Finding the Fourth Proportional to 455,415.38, 628,526.53 and 378,799.31

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Solution

The fourth proportional to 455,415.38, 628,526.53 and 378,799.31 is: 522,787.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,415.38 : 628,526.53 = 378,799.31 : x
  2. Step 2: Convert to fraction form
    455,415.38/628,526.53 = 378,799.31/x
  3. Step 3: Cross multiply
    455,415.38x = 628,526.53 × 378,799.31
  4. Step 4: Simplify right side
    455,415.38x = 238,085,415,880.69
  5. Step 5: Solve for x
    x = 238,085,415,880.69/455,415.38
  6. Step 6: Final answer
    x = 522,787.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.