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Finding the Fourth Proportional to 376,781.12, 520,047.24 and 215,728.84

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Solution

The fourth proportional to 376,781.12, 520,047.24 and 215,728.84 is: 297,756.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,781.12 : 520,047.24 = 215,728.84 : x
  2. Step 2: Convert to fraction form
    376,781.12/520,047.24 = 215,728.84/x
  3. Step 3: Cross multiply
    376,781.12x = 520,047.24 × 215,728.84
  4. Step 4: Simplify right side
    376,781.12x = 112,189,187,830.40
  5. Step 5: Solve for x
    x = 112,189,187,830.40/376,781.12
  6. Step 6: Final answer
    x = 297,756.93

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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.