Home / 691,063.70-1,036,595.55-392,128.14

Finding the Fourth Proportional to 691,063.70, 1,036,595.55 and 392,128.14

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Solution

The fourth proportional to 691,063.70, 1,036,595.55 and 392,128.14 is: 588,192.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,063.70 : 1,036,595.55 = 392,128.14 : x
  2. Step 2: Convert to fraction form
    691,063.70/1,036,595.55 = 392,128.14/x
  3. Step 3: Cross multiply
    691,063.70x = 1,036,595.55 × 392,128.14
  4. Step 4: Simplify right side
    691,063.70x = 406,478,284,953.78
  5. Step 5: Solve for x
    x = 406,478,284,953.78/691,063.70
  6. Step 6: Final answer
    x = 588,192.21

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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.