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Finding the Fourth Proportional to 612,165.20, 918,247.80 and 443,328.80

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Solution

The fourth proportional to 612,165.20, 918,247.80 and 443,328.80 is: 664,993.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,165.20 : 918,247.80 = 443,328.80 : x
  2. Step 2: Convert to fraction form
    612,165.20/918,247.80 = 443,328.80/x
  3. Step 3: Cross multiply
    612,165.20x = 918,247.80 × 443,328.80
  4. Step 4: Simplify right side
    612,165.20x = 407,085,695,276.64
  5. Step 5: Solve for x
    x = 407,085,695,276.64/612,165.20
  6. Step 6: Final answer
    x = 664,993.20

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1.5x scale

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.