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Finding the Fourth Proportional to 556,809.13, 768,396.20 and 315,087.31

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Solution

The fourth proportional to 556,809.13, 768,396.20 and 315,087.31 is: 434,820.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,809.13 : 768,396.20 = 315,087.31 : x
  2. Step 2: Convert to fraction form
    556,809.13/768,396.20 = 315,087.31/x
  3. Step 3: Cross multiply
    556,809.13x = 768,396.20 × 315,087.31
  4. Step 4: Simplify right side
    556,809.13x = 242,111,888,175.80
  5. Step 5: Solve for x
    x = 242,111,888,175.80/556,809.13
  6. Step 6: Final answer
    x = 434,820.26

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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.