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Finding the Fourth Proportional to 641,688.34, 963,478.71 and 357,933.28

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Solution

The fourth proportional to 641,688.34, 963,478.71 and 357,933.28 is: 537,427.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,688.34 : 963,478.71 = 357,933.28 : x
  2. Step 2: Convert to fraction form
    641,688.34/963,478.71 = 357,933.28/x
  3. Step 3: Cross multiply
    641,688.34x = 963,478.71 × 357,933.28
  4. Step 4: Simplify right side
    641,688.34x = 344,861,094,880.47
  5. Step 5: Solve for x
    x = 344,861,094,880.47/641,688.34
  6. Step 6: Final answer
    x = 537,427.71

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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.