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Finding the Fourth Proportional to 612,176.20, 918,264.30 and 443,339.80

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Solution

The fourth proportional to 612,176.20, 918,264.30 and 443,339.80 is: 665,009.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,176.20 : 918,264.30 = 443,339.80 : x
  2. Step 2: Convert to fraction form
    612,176.20/918,264.30 = 443,339.80/x
  3. Step 3: Cross multiply
    612,176.20x = 918,264.30 × 443,339.80
  4. Step 4: Simplify right side
    612,176.20x = 407,103,111,109.14
  5. Step 5: Solve for x
    x = 407,103,111,109.14/612,176.20
  6. Step 6: Final answer
    x = 665,009.70

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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.