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Finding the Fourth Proportional to 638,573.62, 956,776.50 and 385,321.96

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Solution

The fourth proportional to 638,573.62, 956,776.50 and 385,321.96 is: 577,328.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,573.62 : 956,776.50 = 385,321.96 : x
  2. Step 2: Convert to fraction form
    638,573.62/956,776.50 = 385,321.96/x
  3. Step 3: Cross multiply
    638,573.62x = 956,776.50 × 385,321.96
  4. Step 4: Simplify right side
    638,573.62x = 368,666,989,551.45
  5. Step 5: Solve for x
    x = 368,666,989,551.45/638,573.62
  6. Step 6: Final answer
    x = 577,328.87

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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.