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Finding the Fourth Proportional to 520,659.20, 779,260.80 and 378,099.20

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Solution

The fourth proportional to 520,659.20, 779,260.80 and 378,099.20 is: 565,893.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,659.20 : 779,260.80 = 378,099.20 : x
  2. Step 2: Convert to fraction form
    520,659.20/779,260.80 = 378,099.20/x
  3. Step 3: Cross multiply
    520,659.20x = 779,260.80 × 378,099.20
  4. Step 4: Simplify right side
    520,659.20x = 294,637,885,071.36
  5. Step 5: Solve for x
    x = 294,637,885,071.36/520,659.20
  6. Step 6: Final answer
    x = 565,893.94

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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.