Home / 385,528.16-578,321.40-119,315.60

Finding the Fourth Proportional to 385,528.16, 578,321.40 and 119,315.60

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Solution

The fourth proportional to 385,528.16, 578,321.40 and 119,315.60 is: 178,982.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,528.16 : 578,321.40 = 119,315.60 : x
  2. Step 2: Convert to fraction form
    385,528.16/578,321.40 = 119,315.60/x
  3. Step 3: Cross multiply
    385,528.16x = 578,321.40 × 119,315.60
  4. Step 4: Simplify right side
    385,528.16x = 69,002,764,833.84
  5. Step 5: Solve for x
    x = 69,002,764,833.84/385,528.16
  6. Step 6: Final answer
    x = 178,982.42

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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.