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Finding the Fourth Proportional to 555,142.20, 766,053.48 and 313,448.64

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Solution

The fourth proportional to 555,142.20, 766,053.48 and 313,448.64 is: 432,534.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,142.20 : 766,053.48 = 313,448.64 : x
  2. Step 2: Convert to fraction form
    555,142.20/766,053.48 = 313,448.64/x
  3. Step 3: Cross multiply
    555,142.20x = 766,053.48 × 313,448.64
  4. Step 4: Simplify right side
    555,142.20x = 240,118,421,473.27
  5. Step 5: Solve for x
    x = 240,118,421,473.27/555,142.20
  6. Step 6: Final answer
    x = 432,534.98

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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.