Home / 457,905.20-686,663.40-221,320.40

Finding the Fourth Proportional to 457,905.20, 686,663.40 and 221,320.40

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Solution

The fourth proportional to 457,905.20, 686,663.40 and 221,320.40 is: 331,886.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,905.20 : 686,663.40 = 221,320.40 : x
  2. Step 2: Convert to fraction form
    457,905.20/686,663.40 = 221,320.40/x
  3. Step 3: Cross multiply
    457,905.20x = 686,663.40 × 221,320.40
  4. Step 4: Simplify right side
    457,905.20x = 151,972,618,353.36
  5. Step 5: Solve for x
    x = 151,972,618,353.36/457,905.20
  6. Step 6: Final answer
    x = 331,886.64

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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.