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Finding the Fourth Proportional to 555,612.44, 766,699.68 and 313,916

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Solution

The fourth proportional to 555,612.44, 766,699.68 and 313,916 is: 433,178.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,612.44 : 766,699.68 = 313,916 : x
  2. Step 2: Convert to fraction form
    555,612.44/766,699.68 = 313,916/x
  3. Step 3: Cross multiply
    555,612.44x = 766,699.68 × 313,916
  4. Step 4: Simplify right side
    555,612.44x = 240,679,296,746.88
  5. Step 5: Solve for x
    x = 240,679,296,746.88/555,612.44
  6. Step 6: Final answer
    x = 433,178.38

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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.