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Finding the Fourth Proportional to 636,797.60, 878,762.28 and 346,400

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Solution

The fourth proportional to 636,797.60, 878,762.28 and 346,400 is: 478,021.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,797.60 : 878,762.28 = 346,400 : x
  2. Step 2: Convert to fraction form
    636,797.60/878,762.28 = 346,400/x
  3. Step 3: Cross multiply
    636,797.60x = 878,762.28 × 346,400
  4. Step 4: Simplify right side
    636,797.60x = 304,403,253,792
  5. Step 5: Solve for x
    x = 304,403,253,792/636,797.60
  6. Step 6: Final answer
    x = 478,021.99

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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.