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Finding the Fourth Proportional to 657,711.56, 907,644.36 and 355,905.56

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Solution

The fourth proportional to 657,711.56, 907,644.36 and 355,905.56 is: 491,150.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,711.56 : 907,644.36 = 355,905.56 : x
  2. Step 2: Convert to fraction form
    657,711.56/907,644.36 = 355,905.56/x
  3. Step 3: Cross multiply
    657,711.56x = 907,644.36 × 355,905.56
  4. Step 4: Simplify right side
    657,711.56x = 323,035,674,226.64
  5. Step 5: Solve for x
    x = 323,035,674,226.64/657,711.56
  6. Step 6: Final answer
    x = 491,150.98

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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.