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Finding the Fourth Proportional to 385,381.80, 578,072.70 and 346,015.80

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Solution

The fourth proportional to 385,381.80, 578,072.70 and 346,015.80 is: 519,023.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,381.80 : 578,072.70 = 346,015.80 : x
  2. Step 2: Convert to fraction form
    385,381.80/578,072.70 = 346,015.80/x
  3. Step 3: Cross multiply
    385,381.80x = 578,072.70 × 346,015.80
  4. Step 4: Simplify right side
    385,381.80x = 200,022,287,748.66
  5. Step 5: Solve for x
    x = 200,022,287,748.66/385,381.80
  6. Step 6: Final answer
    x = 519,023.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.