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Finding the Fourth Proportional to 642,833.98, 887,051.28 and 356,329.72

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Solution

The fourth proportional to 642,833.98, 887,051.28 and 356,329.72 is: 491,701.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,833.98 : 887,051.28 = 356,329.72 : x
  2. Step 2: Convert to fraction form
    642,833.98/887,051.28 = 356,329.72/x
  3. Step 3: Cross multiply
    642,833.98x = 887,051.28 × 356,329.72
  4. Step 4: Simplify right side
    642,833.98x = 316,082,734,228.04
  5. Step 5: Solve for x
    x = 316,082,734,228.04/642,833.98
  6. Step 6: Final answer
    x = 491,701.97

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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.