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Finding the Fourth Proportional to 612,479.65, 918,842.11 and 342,991.03

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Solution

The fourth proportional to 612,479.65, 918,842.11 and 342,991.03 is: 514,555.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,479.65 : 918,842.11 = 342,991.03 : x
  2. Step 2: Convert to fraction form
    612,479.65/918,842.11 = 342,991.03/x
  3. Step 3: Cross multiply
    612,479.65x = 918,842.11 × 342,991.03
  4. Step 4: Simplify right side
    612,479.65x = 315,154,601,716.27
  5. Step 5: Solve for x
    x = 315,154,601,716.27/612,479.65
  6. Step 6: Final answer
    x = 514,555.22

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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.