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Finding the Fourth Proportional to 520,980.40, 781,729.80 and 296,513.20

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Solution

The fourth proportional to 520,980.40, 781,729.80 and 296,513.20 is: 444,917.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,980.40 : 781,729.80 = 296,513.20 : x
  2. Step 2: Convert to fraction form
    520,980.40/781,729.80 = 296,513.20/x
  3. Step 3: Cross multiply
    520,980.40x = 781,729.80 × 296,513.20
  4. Step 4: Simplify right side
    520,980.40x = 231,793,204,533.36
  5. Step 5: Solve for x
    x = 231,793,204,533.36/520,980.40
  6. Step 6: Final answer
    x = 444,917.32

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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.