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Finding the Fourth Proportional to 811,529.80, 1,218,293.10 and 512,009.80

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Solution

The fourth proportional to 811,529.80, 1,218,293.10 and 512,009.80 is: 768,644.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,529.80 : 1,218,293.10 = 512,009.80 : x
  2. Step 2: Convert to fraction form
    811,529.80/1,218,293.10 = 512,009.80/x
  3. Step 3: Cross multiply
    811,529.80x = 1,218,293.10 × 512,009.80
  4. Step 4: Simplify right side
    811,529.80x = 623,778,006,472.38
  5. Step 5: Solve for x
    x = 623,778,006,472.38/811,529.80
  6. Step 6: Final answer
    x = 768,644.61

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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.