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Finding the Fourth Proportional to 556,965.25, 768,480.35 and 315,247.85

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Solution

The fourth proportional to 556,965.25, 768,480.35 and 315,247.85 is: 434,967.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,965.25 : 768,480.35 = 315,247.85 : x
  2. Step 2: Convert to fraction form
    556,965.25/768,480.35 = 315,247.85/x
  3. Step 3: Cross multiply
    556,965.25x = 768,480.35 × 315,247.85
  4. Step 4: Simplify right side
    556,965.25x = 242,261,775,567.91
  5. Step 5: Solve for x
    x = 242,261,775,567.91/556,965.25
  6. Step 6: Final answer
    x = 434,967.49

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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.