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Finding the Fourth Proportional to 610,855.65, 916,063.92 and 211,387.95

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Solution

The fourth proportional to 610,855.65, 916,063.92 and 211,387.95 is: 317,005.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,855.65 : 916,063.92 = 211,387.95 : x
  2. Step 2: Convert to fraction form
    610,855.65/916,063.92 = 211,387.95/x
  3. Step 3: Cross multiply
    610,855.65x = 916,063.92 × 211,387.95
  4. Step 4: Simplify right side
    610,855.65x = 193,644,874,117.76
  5. Step 5: Solve for x
    x = 193,644,874,117.76/610,855.65
  6. Step 6: Final answer
    x = 317,005.95

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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.