Home / 689,985.61-1,035,125.87-210,251.72

Finding the Fourth Proportional to 689,985.61, 1,035,125.87 and 210,251.72

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Solution

The fourth proportional to 689,985.61, 1,035,125.87 and 210,251.72 is: 315,422.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,985.61 : 1,035,125.87 = 210,251.72 : x
  2. Step 2: Convert to fraction form
    689,985.61/1,035,125.87 = 210,251.72/x
  3. Step 3: Cross multiply
    689,985.61x = 1,035,125.87 × 210,251.72
  4. Step 4: Simplify right side
    689,985.61x = 217,636,990,297.97
  5. Step 5: Solve for x
    x = 217,636,990,297.97/689,985.61
  6. Step 6: Final answer
    x = 315,422.51

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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.