Home / 386,430.20-579,674.10-137,079.80

Finding the Fourth Proportional to 386,430.20, 579,674.10 and 137,079.80

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Solution

The fourth proportional to 386,430.20, 579,674.10 and 137,079.80 is: 205,629.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,430.20 : 579,674.10 = 137,079.80 : x
  2. Step 2: Convert to fraction form
    386,430.20/579,674.10 = 137,079.80/x
  3. Step 3: Cross multiply
    386,430.20x = 579,674.10 × 137,079.80
  4. Step 4: Simplify right side
    386,430.20x = 79,461,609,693.18
  5. Step 5: Solve for x
    x = 79,461,609,693.18/386,430.20
  6. Step 6: Final answer
    x = 205,629.92

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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.