Home / 385,711.37-578,455.34-115,828.62

Finding the Fourth Proportional to 385,711.37, 578,455.34 and 115,828.62

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Solution

The fourth proportional to 385,711.37, 578,455.34 and 115,828.62 is: 173,709.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,711.37 : 578,455.34 = 115,828.62 : x
  2. Step 2: Convert to fraction form
    385,711.37/578,455.34 = 115,828.62/x
  3. Step 3: Cross multiply
    385,711.37x = 578,455.34 × 115,828.62
  4. Step 4: Simplify right side
    385,711.37x = 67,001,683,184.69
  5. Step 5: Solve for x
    x = 67,001,683,184.69/385,711.37
  6. Step 6: Final answer
    x = 173,709.38

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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.