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Finding the Fourth Proportional to 612,003.80, 918,005.70 and 446,115.80

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Solution

The fourth proportional to 612,003.80, 918,005.70 and 446,115.80 is: 669,173.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,003.80 : 918,005.70 = 446,115.80 : x
  2. Step 2: Convert to fraction form
    612,003.80/918,005.70 = 446,115.80/x
  3. Step 3: Cross multiply
    612,003.80x = 918,005.70 × 446,115.80
  4. Step 4: Simplify right side
    612,003.80x = 409,536,847,260.06
  5. Step 5: Solve for x
    x = 409,536,847,260.06/612,003.80
  6. Step 6: Final answer
    x = 669,173.70

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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.