Home / 457,431.20-686,535.60-368,784.80

Finding the Fourth Proportional to 457,431.20, 686,535.60 and 368,784.80

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Solution

The fourth proportional to 457,431.20, 686,535.60 and 368,784.80 is: 553,490.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,431.20 : 686,535.60 = 368,784.80 : x
  2. Step 2: Convert to fraction form
    457,431.20/686,535.60 = 368,784.80/x
  3. Step 3: Cross multiply
    457,431.20x = 686,535.60 × 368,784.80
  4. Step 4: Simplify right side
    457,431.20x = 253,183,893,938.88
  5. Step 5: Solve for x
    x = 253,183,893,938.88/457,431.20
  6. Step 6: Final answer
    x = 553,490.65

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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.