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Finding the Fourth Proportional to 388,652.86, 536,588.58 and 317,203.30

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Solution

The fourth proportional to 388,652.86, 536,588.58 and 317,203.30 is: 437,942.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,652.86 : 536,588.58 = 317,203.30 : x
  2. Step 2: Convert to fraction form
    388,652.86/536,588.58 = 317,203.30/x
  3. Step 3: Cross multiply
    388,652.86x = 536,588.58 × 317,203.30
  4. Step 4: Simplify right side
    388,652.86x = 170,207,668,318.31
  5. Step 5: Solve for x
    x = 170,207,668,318.31/388,652.86
  6. Step 6: Final answer
    x = 437,942.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.