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Finding the Fourth Proportional to 885,816, 1,328,724 and 287,277.84

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Solution

The fourth proportional to 885,816, 1,328,724 and 287,277.84 is: 430,916.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,816 : 1,328,724 = 287,277.84 : x
  2. Step 2: Convert to fraction form
    885,816/1,328,724 = 287,277.84/x
  3. Step 3: Cross multiply
    885,816x = 1,328,724 × 287,277.84
  4. Step 4: Simplify right side
    885,816x = 381,712,960,676.16
  5. Step 5: Solve for x
    x = 381,712,960,676.16/885,816
  6. Step 6: Final answer
    x = 430,916.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.