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Finding the Fourth Proportional to 521,664.80, 783,080.40 and 403,858.40

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Solution

The fourth proportional to 521,664.80, 783,080.40 and 403,858.40 is: 606,239.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,664.80 : 783,080.40 = 403,858.40 : x
  2. Step 2: Convert to fraction form
    521,664.80/783,080.40 = 403,858.40/x
  3. Step 3: Cross multiply
    521,664.80x = 783,080.40 × 403,858.40
  4. Step 4: Simplify right side
    521,664.80x = 316,253,597,415.36
  5. Step 5: Solve for x
    x = 316,253,597,415.36/521,664.80
  6. Step 6: Final answer
    x = 606,239.10

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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.