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Finding the Fourth Proportional to 612,181.70, 918,272.55 and 443,345.30

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Solution

The fourth proportional to 612,181.70, 918,272.55 and 443,345.30 is: 665,017.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,181.70 : 918,272.55 = 443,345.30 : x
  2. Step 2: Convert to fraction form
    612,181.70/918,272.55 = 443,345.30/x
  3. Step 3: Cross multiply
    612,181.70x = 918,272.55 × 443,345.30
  4. Step 4: Simplify right side
    612,181.70x = 407,111,819,161.52
  5. Step 5: Solve for x
    x = 407,111,819,161.52/612,181.70
  6. Step 6: Final answer
    x = 665,017.95

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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.