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Finding the Fourth Proportional to 555,076.80, 766,008.72 and 313,369.20

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Solution

The fourth proportional to 555,076.80, 766,008.72 and 313,369.20 is: 432,451.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,076.80 : 766,008.72 = 313,369.20 : x
  2. Step 2: Convert to fraction form
    555,076.80/766,008.72 = 313,369.20/x
  3. Step 3: Cross multiply
    555,076.80x = 766,008.72 × 313,369.20
  4. Step 4: Simplify right side
    555,076.80x = 240,043,539,779.42
  5. Step 5: Solve for x
    x = 240,043,539,779.42/555,076.80
  6. Step 6: Final answer
    x = 432,451.04

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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.