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Finding the Fourth Proportional to 612,108.80, 918,163.20 and 433,649.60

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Solution

The fourth proportional to 612,108.80, 918,163.20 and 433,649.60 is: 650,474.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,108.80 : 918,163.20 = 433,649.60 : x
  2. Step 2: Convert to fraction form
    612,108.80/918,163.20 = 433,649.60/x
  3. Step 3: Cross multiply
    612,108.80x = 918,163.20 × 433,649.60
  4. Step 4: Simplify right side
    612,108.80x = 398,161,104,414.72
  5. Step 5: Solve for x
    x = 398,161,104,414.72/612,108.80
  6. Step 6: Final answer
    x = 650,474.40

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Double scale
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Similar ratio
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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.