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Finding the Fourth Proportional to 547,785.80, 821,678.70 and 336,739.40

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Solution

The fourth proportional to 547,785.80, 821,678.70 and 336,739.40 is: 505,109.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,785.80 : 821,678.70 = 336,739.40 : x
  2. Step 2: Convert to fraction form
    547,785.80/821,678.70 = 336,739.40/x
  3. Step 3: Cross multiply
    547,785.80x = 821,678.70 × 336,739.40
  4. Step 4: Simplify right side
    547,785.80x = 276,691,592,430.78
  5. Step 5: Solve for x
    x = 276,691,592,430.78/547,785.80
  6. Step 6: Final answer
    x = 505,109.10

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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.