Home / 386,420.40-579,519.83-130,225.07

Finding the Fourth Proportional to 386,420.40, 579,519.83 and 130,225.07

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Solution

The fourth proportional to 386,420.40, 579,519.83 and 130,225.07 is: 195,300.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,420.40 : 579,519.83 = 130,225.07 : x
  2. Step 2: Convert to fraction form
    386,420.40/579,519.83 = 130,225.07/x
  3. Step 3: Cross multiply
    386,420.40x = 579,519.83 × 130,225.07
  4. Step 4: Simplify right side
    386,420.40x = 75,468,012,202.50
  5. Step 5: Solve for x
    x = 75,468,012,202.50/386,420.40
  6. Step 6: Final answer
    x = 195,300.28

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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.