Home / 812,117.80-1,218,176.70-497,189.80

Finding the Fourth Proportional to 812,117.80, 1,218,176.70 and 497,189.80

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Solution

The fourth proportional to 812,117.80, 1,218,176.70 and 497,189.80 is: 745,784.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,117.80 : 1,218,176.70 = 497,189.80 : x
  2. Step 2: Convert to fraction form
    812,117.80/1,218,176.70 = 497,189.80/x
  3. Step 3: Cross multiply
    812,117.80x = 1,218,176.70 × 497,189.80
  4. Step 4: Simplify right side
    812,117.80x = 605,665,029,837.66
  5. Step 5: Solve for x
    x = 605,665,029,837.66/812,117.80
  6. Step 6: Final answer
    x = 745,784.70

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Double scale
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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.