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Finding the Fourth Proportional to 556,849.88, 768,452.43 and 315,128.06

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Solution

The fourth proportional to 556,849.88, 768,452.43 and 315,128.06 is: 434,876.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,849.88 : 768,452.43 = 315,128.06 : x
  2. Step 2: Convert to fraction form
    556,849.88/768,452.43 = 315,128.06/x
  3. Step 3: Cross multiply
    556,849.88x = 768,452.43 × 315,128.06
  4. Step 4: Simplify right side
    556,849.88x = 242,160,923,468.19
  5. Step 5: Solve for x
    x = 242,160,923,468.19/556,849.88
  6. Step 6: Final answer
    x = 434,876.49

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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.