Home / 687,381.20-1,029,851.76-287,141.12

Finding the Fourth Proportional to 687,381.20, 1,029,851.76 and 287,141.12

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Solution

The fourth proportional to 687,381.20, 1,029,851.76 and 287,141.12 is: 430,202.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,381.20 : 1,029,851.76 = 287,141.12 : x
  2. Step 2: Convert to fraction form
    687,381.20/1,029,851.76 = 287,141.12/x
  3. Step 3: Cross multiply
    687,381.20x = 1,029,851.76 × 287,141.12
  4. Step 4: Simplify right side
    687,381.20x = 295,712,787,800.37
  5. Step 5: Solve for x
    x = 295,712,787,800.37/687,381.20
  6. Step 6: Final answer
    x = 430,202.03

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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.