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Finding the Fourth Proportional to 612,311.28, 918,484.20 and 169,079.28

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Solution

The fourth proportional to 612,311.28, 918,484.20 and 169,079.28 is: 253,623.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,311.28 : 918,484.20 = 169,079.28 : x
  2. Step 2: Convert to fraction form
    612,311.28/918,484.20 = 169,079.28/x
  3. Step 3: Cross multiply
    612,311.28x = 918,484.20 × 169,079.28
  4. Step 4: Simplify right side
    612,311.28x = 155,296,647,227.38
  5. Step 5: Solve for x
    x = 155,296,647,227.38/612,311.28
  6. Step 6: Final answer
    x = 253,623.69

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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.