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Finding the Fourth Proportional to 555,419.60, 765,905.68 and 475,112.96

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Solution

The fourth proportional to 555,419.60, 765,905.68 and 475,112.96 is: 655,165.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,419.60 : 765,905.68 = 475,112.96 : x
  2. Step 2: Convert to fraction form
    555,419.60/765,905.68 = 475,112.96/x
  3. Step 3: Cross multiply
    555,419.60x = 765,905.68 × 475,112.96
  4. Step 4: Simplify right side
    555,419.60x = 363,891,714,705.61
  5. Step 5: Solve for x
    x = 363,891,714,705.61/555,419.60
  6. Step 6: Final answer
    x = 655,165.42

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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.