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Finding the Fourth Proportional to 555,006.81, 766,057.41 and 313,430.79

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Solution

The fourth proportional to 555,006.81, 766,057.41 and 313,430.79 is: 432,618.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,006.81 : 766,057.41 = 313,430.79 : x
  2. Step 2: Convert to fraction form
    555,006.81/766,057.41 = 313,430.79/x
  3. Step 3: Cross multiply
    555,006.81x = 766,057.41 × 313,430.79
  4. Step 4: Simplify right side
    555,006.81x = 240,105,979,201.65
  5. Step 5: Solve for x
    x = 240,105,979,201.65/555,006.81
  6. Step 6: Final answer
    x = 432,618.08

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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.