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Finding the Fourth Proportional to 644,089.96, 887,381.89 and 498,394.72

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Solution

The fourth proportional to 644,089.96, 887,381.89 and 498,394.72 is: 686,653.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,089.96 : 887,381.89 = 498,394.72 : x
  2. Step 2: Convert to fraction form
    644,089.96/887,381.89 = 498,394.72/x
  3. Step 3: Cross multiply
    644,089.96x = 887,381.89 × 498,394.72
  4. Step 4: Simplify right side
    644,089.96x = 442,266,448,599.62
  5. Step 5: Solve for x
    x = 442,266,448,599.62/644,089.96
  6. Step 6: Final answer
    x = 686,653.23

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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.