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Finding the Fourth Proportional to 612,003.20, 918,004.80 and 213,094.40

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Solution

The fourth proportional to 612,003.20, 918,004.80 and 213,094.40 is: 319,641.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,003.20 : 918,004.80 = 213,094.40 : x
  2. Step 2: Convert to fraction form
    612,003.20/918,004.80 = 213,094.40/x
  3. Step 3: Cross multiply
    612,003.20x = 918,004.80 × 213,094.40
  4. Step 4: Simplify right side
    612,003.20x = 195,621,682,053.12
  5. Step 5: Solve for x
    x = 195,621,682,053.12/612,003.20
  6. Step 6: Final answer
    x = 319,641.60

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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.