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Finding the Fourth Proportional to 557,109.37, 768,858.51 and 315,434.53

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Solution

The fourth proportional to 557,109.37, 768,858.51 and 315,434.53 is: 435,326.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,109.37 : 768,858.51 = 315,434.53 : x
  2. Step 2: Convert to fraction form
    557,109.37/768,858.51 = 315,434.53/x
  3. Step 3: Cross multiply
    557,109.37x = 768,858.51 × 315,434.53
  4. Step 4: Simplify right side
    557,109.37x = 242,524,522,738.35
  5. Step 5: Solve for x
    x = 242,524,522,738.35/557,109.37
  6. Step 6: Final answer
    x = 435,326.59

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1.5x scale

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.