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Finding the Fourth Proportional to 811,609.80, 1,215,081.90 and 496,681.80

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Solution

The fourth proportional to 811,609.80, 1,215,081.90 and 496,681.80 is: 743,595.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,609.80 : 1,215,081.90 = 496,681.80 : x
  2. Step 2: Convert to fraction form
    811,609.80/1,215,081.90 = 496,681.80/x
  3. Step 3: Cross multiply
    811,609.80x = 1,215,081.90 × 496,681.80
  4. Step 4: Simplify right side
    811,609.80x = 603,509,065,239.42
  5. Step 5: Solve for x
    x = 603,509,065,239.42/811,609.80
  6. Step 6: Final answer
    x = 743,595.09

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Double scale
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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.