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Finding the Fourth Proportional to 612,187.70, 918,281.55 and 543,953.30

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Solution

The fourth proportional to 612,187.70, 918,281.55 and 543,953.30 is: 815,929.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,187.70 : 918,281.55 = 543,953.30 : x
  2. Step 2: Convert to fraction form
    612,187.70/918,281.55 = 543,953.30/x
  3. Step 3: Cross multiply
    612,187.70x = 918,281.55 × 543,953.30
  4. Step 4: Simplify right side
    612,187.70x = 499,502,279,451.62
  5. Step 5: Solve for x
    x = 499,502,279,451.62/612,187.70
  6. Step 6: Final answer
    x = 815,929.95

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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.