Home / 679,421.20-1,019,909.40-399,096.40

Finding the Fourth Proportional to 679,421.20, 1,019,909.40 and 399,096.40

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Solution

The fourth proportional to 679,421.20, 1,019,909.40 and 399,096.40 is: 599,101.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,421.20 : 1,019,909.40 = 399,096.40 : x
  2. Step 2: Convert to fraction form
    679,421.20/1,019,909.40 = 399,096.40/x
  3. Step 3: Cross multiply
    679,421.20x = 1,019,909.40 × 399,096.40
  4. Step 4: Simplify right side
    679,421.20x = 407,042,169,866.16
  5. Step 5: Solve for x
    x = 407,042,169,866.16/679,421.20
  6. Step 6: Final answer
    x = 599,101.37

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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.