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Finding the Fourth Proportional to 612,778.24, 919,192.08 and 213,459.40

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Solution

The fourth proportional to 612,778.24, 919,192.08 and 213,459.40 is: 320,197.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,778.24 : 919,192.08 = 213,459.40 : x
  2. Step 2: Convert to fraction form
    612,778.24/919,192.08 = 213,459.40/x
  3. Step 3: Cross multiply
    612,778.24x = 919,192.08 × 213,459.40
  4. Step 4: Simplify right side
    612,778.24x = 196,210,189,881.55
  5. Step 5: Solve for x
    x = 196,210,189,881.55/612,778.24
  6. Step 6: Final answer
    x = 320,197.71

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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.