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Finding the Fourth Proportional to 376,855.76, 520,059.36 and 215,710

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Solution

The fourth proportional to 376,855.76, 520,059.36 and 215,710 is: 297,678.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,855.76 : 520,059.36 = 215,710 : x
  2. Step 2: Convert to fraction form
    376,855.76/520,059.36 = 215,710/x
  3. Step 3: Cross multiply
    376,855.76x = 520,059.36 × 215,710
  4. Step 4: Simplify right side
    376,855.76x = 112,182,004,545.60
  5. Step 5: Solve for x
    x = 112,182,004,545.60/376,855.76
  6. Step 6: Final answer
    x = 297,678.89

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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.