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Finding the Fourth Proportional to 529,655.28, 730,915.56 and 287,943.84

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Solution

The fourth proportional to 529,655.28, 730,915.56 and 287,943.84 is: 397,357.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,655.28 : 730,915.56 = 287,943.84 : x
  2. Step 2: Convert to fraction form
    529,655.28/730,915.56 = 287,943.84/x
  3. Step 3: Cross multiply
    529,655.28x = 730,915.56 × 287,943.84
  4. Step 4: Simplify right side
    529,655.28x = 210,462,633,062.15
  5. Step 5: Solve for x
    x = 210,462,633,062.15/529,655.28
  6. Step 6: Final answer
    x = 397,357.76

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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.