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Finding the Fourth Proportional to 663,857.84, 916,119.63 and 377,377.92

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Solution

The fourth proportional to 663,857.84, 916,119.63 and 377,377.92 is: 520,779.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,857.84 : 916,119.63 = 377,377.92 : x
  2. Step 2: Convert to fraction form
    663,857.84/916,119.63 = 377,377.92/x
  3. Step 3: Cross multiply
    663,857.84x = 916,119.63 × 377,377.92
  4. Step 4: Simplify right side
    663,857.84x = 345,723,320,440.57
  5. Step 5: Solve for x
    x = 345,723,320,440.57/663,857.84
  6. Step 6: Final answer
    x = 520,779.15

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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.