Home / 679,615.20-1,020,200.40-399,290.40

Finding the Fourth Proportional to 679,615.20, 1,020,200.40 and 399,290.40

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Solution

The fourth proportional to 679,615.20, 1,020,200.40 and 399,290.40 is: 599,392.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,615.20 : 1,020,200.40 = 399,290.40 : x
  2. Step 2: Convert to fraction form
    679,615.20/1,020,200.40 = 399,290.40/x
  3. Step 3: Cross multiply
    679,615.20x = 1,020,200.40 × 399,290.40
  4. Step 4: Simplify right side
    679,615.20x = 407,356,225,796.16
  5. Step 5: Solve for x
    x = 407,356,225,796.16/679,615.20
  6. Step 6: Final answer
    x = 599,392.46

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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.