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Finding the Fourth Proportional to 636,978.80, 879,004.40 and 346,591.58

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Solution

The fourth proportional to 636,978.80, 879,004.40 and 346,591.58 is: 478,282.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,978.80 : 879,004.40 = 346,591.58 : x
  2. Step 2: Convert to fraction form
    636,978.80/879,004.40 = 346,591.58/x
  3. Step 3: Cross multiply
    636,978.80x = 879,004.40 × 346,591.58
  4. Step 4: Simplify right side
    636,978.80x = 304,655,517,694.97
  5. Step 5: Solve for x
    x = 304,655,517,694.97/636,978.80
  6. Step 6: Final answer
    x = 478,282.03

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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.