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Finding the Fourth Proportional to 642,437.64, 886,526.82 and 355,940.64

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Solution

The fourth proportional to 642,437.64, 886,526.82 and 355,940.64 is: 491,177.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,437.64 : 886,526.82 = 355,940.64 : x
  2. Step 2: Convert to fraction form
    642,437.64/886,526.82 = 355,940.64/x
  3. Step 3: Cross multiply
    642,437.64x = 886,526.82 × 355,940.64
  4. Step 4: Simplify right side
    642,437.64x = 315,550,923,687.97
  5. Step 5: Solve for x
    x = 315,550,923,687.97/642,437.64
  6. Step 6: Final answer
    x = 491,177.52

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1.5x scale

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.