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Finding the Fourth Proportional to 556,838.45, 768,436.56 and 315,116.63

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Solution

The fourth proportional to 556,838.45, 768,436.56 and 315,116.63 is: 434,860.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,838.45 : 768,436.56 = 315,116.63 : x
  2. Step 2: Convert to fraction form
    556,838.45/768,436.56 = 315,116.63/x
  3. Step 3: Cross multiply
    556,838.45x = 768,436.56 × 315,116.63
  4. Step 4: Simplify right side
    556,838.45x = 242,147,135,313.81
  5. Step 5: Solve for x
    x = 242,147,135,313.81/556,838.45
  6. Step 6: Final answer
    x = 434,860.66

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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.