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Finding the Fourth Proportional to 557,108.37, 768,857.13 and 315,433.53

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Solution

The fourth proportional to 557,108.37, 768,857.13 and 315,433.53 is: 435,325.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,108.37 : 768,857.13 = 315,433.53 : x
  2. Step 2: Convert to fraction form
    557,108.37/768,857.13 = 315,433.53/x
  3. Step 3: Cross multiply
    557,108.37x = 768,857.13 × 315,433.53
  4. Step 4: Simplify right side
    557,108.37x = 242,523,318,581.57
  5. Step 5: Solve for x
    x = 242,523,318,581.57/557,108.37
  6. Step 6: Final answer
    x = 435,325.21

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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.