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Finding the Fourth Proportional to 612,479.80, 918,842.34 and 342,991.18

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Solution

The fourth proportional to 612,479.80, 918,842.34 and 342,991.18 is: 514,555.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,479.80 : 918,842.34 = 342,991.18 : x
  2. Step 2: Convert to fraction form
    612,479.80/918,842.34 = 342,991.18/x
  3. Step 3: Cross multiply
    612,479.80x = 918,842.34 × 342,991.18
  4. Step 4: Simplify right side
    612,479.80x = 315,154,814,847.24
  5. Step 5: Solve for x
    x = 315,154,814,847.24/612,479.80
  6. Step 6: Final answer
    x = 514,555.44

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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.