Home / 427,791.53-642,318.10-238,621.50

Finding the Fourth Proportional to 427,791.53, 642,318.10 and 238,621.50

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Solution

The fourth proportional to 427,791.53, 642,318.10 and 238,621.50 is: 358,284.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,791.53 : 642,318.10 = 238,621.50 : x
  2. Step 2: Convert to fraction form
    427,791.53/642,318.10 = 238,621.50/x
  3. Step 3: Cross multiply
    427,791.53x = 642,318.10 × 238,621.50
  4. Step 4: Simplify right side
    427,791.53x = 153,270,908,499.15
  5. Step 5: Solve for x
    x = 153,270,908,499.15/427,791.53
  6. Step 6: Final answer
    x = 358,284.11

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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.