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Finding the Fourth Proportional to 612,479.83, 918,842.38 and 342,991.21

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Solution

The fourth proportional to 612,479.83, 918,842.38 and 342,991.21 is: 514,555.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,479.83 : 918,842.38 = 342,991.21 : x
  2. Step 2: Convert to fraction form
    612,479.83/918,842.38 = 342,991.21/x
  3. Step 3: Cross multiply
    612,479.83x = 918,842.38 × 342,991.21
  4. Step 4: Simplify right side
    612,479.83x = 315,154,859,715.48
  5. Step 5: Solve for x
    x = 315,154,859,715.48/612,479.83
  6. Step 6: Final answer
    x = 514,555.49

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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.