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Finding the Fourth Proportional to 438,318.37, 656,928.71 and 235,415.86

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Solution

The fourth proportional to 438,318.37, 656,928.71 and 235,415.86 is: 352,829.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,318.37 : 656,928.71 = 235,415.86 : x
  2. Step 2: Convert to fraction form
    438,318.37/656,928.71 = 235,415.86/x
  3. Step 3: Cross multiply
    438,318.37x = 656,928.71 × 235,415.86
  4. Step 4: Simplify right side
    438,318.37x = 154,651,437,223.34
  5. Step 5: Solve for x
    x = 154,651,437,223.34/438,318.37
  6. Step 6: Final answer
    x = 352,829.01

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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.