Home / 1,186,978.38-1,780,469.80-288,420.88

Finding the Fourth Proportional to 1,186,978.38, 1,780,469.80 and 288,420.88

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Solution

The fourth proportional to 1,186,978.38, 1,780,469.80 and 288,420.88 is: 432,631.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186,978.38 : 1,780,469.80 = 288,420.88 : x
  2. Step 2: Convert to fraction form
    1,186,978.38/1,780,469.80 = 288,420.88/x
  3. Step 3: Cross multiply
    1,186,978.38x = 1,780,469.80 × 288,420.88
  4. Step 4: Simplify right side
    1,186,978.38x = 513,524,666,529.42
  5. Step 5: Solve for x
    x = 513,524,666,529.42/1,186,978.38
  6. Step 6: Final answer
    x = 432,631.86

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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.