Home / 385,631.20-578,446.80-136,313.20

Finding the Fourth Proportional to 385,631.20, 578,446.80 and 136,313.20

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Solution

The fourth proportional to 385,631.20, 578,446.80 and 136,313.20 is: 204,469.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,631.20 : 578,446.80 = 136,313.20 : x
  2. Step 2: Convert to fraction form
    385,631.20/578,446.80 = 136,313.20/x
  3. Step 3: Cross multiply
    385,631.20x = 578,446.80 × 136,313.20
  4. Step 4: Simplify right side
    385,631.20x = 78,849,934,337.76
  5. Step 5: Solve for x
    x = 78,849,934,337.76/385,631.20
  6. Step 6: Final answer
    x = 204,469.80

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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.