Home / 386,972.85-579,311.10-287,573.70

Finding the Fourth Proportional to 386,972.85, 579,311.10 and 287,573.70

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Solution

The fourth proportional to 386,972.85, 579,311.10 and 287,573.70 is: 430,507.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,972.85 : 579,311.10 = 287,573.70 : x
  2. Step 2: Convert to fraction form
    386,972.85/579,311.10 = 287,573.70/x
  3. Step 3: Cross multiply
    386,972.85x = 579,311.10 × 287,573.70
  4. Step 4: Simplify right side
    386,972.85x = 166,594,636,478.07
  5. Step 5: Solve for x
    x = 166,594,636,478.07/386,972.85
  6. Step 6: Final answer
    x = 430,507.30

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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.