Home / 869,146.92-1,199,478.18-487,173.78

Finding the Fourth Proportional to 869,146.92, 1,199,478.18 and 487,173.78

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Solution

The fourth proportional to 869,146.92, 1,199,478.18 and 487,173.78 is: 672,330.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,146.92 : 1,199,478.18 = 487,173.78 : x
  2. Step 2: Convert to fraction form
    869,146.92/1,199,478.18 = 487,173.78/x
  3. Step 3: Cross multiply
    869,146.92x = 1,199,478.18 × 487,173.78
  4. Step 4: Simplify right side
    869,146.92x = 584,354,318,978.12
  5. Step 5: Solve for x
    x = 584,354,318,978.12/869,146.92
  6. Step 6: Final answer
    x = 672,330.89

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.