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Finding the Fourth Proportional to 612,042.20, 918,063.30 and 543,807.80

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Solution

The fourth proportional to 612,042.20, 918,063.30 and 543,807.80 is: 815,711.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,042.20 : 918,063.30 = 543,807.80 : x
  2. Step 2: Convert to fraction form
    612,042.20/918,063.30 = 543,807.80/x
  3. Step 3: Cross multiply
    612,042.20x = 918,063.30 × 543,807.80
  4. Step 4: Simplify right side
    612,042.20x = 499,249,983,433.74
  5. Step 5: Solve for x
    x = 499,249,983,433.74/612,042.20
  6. Step 6: Final answer
    x = 815,711.70

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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.