Home / 525,110.40-787,665.60-399,139.20

Finding the Fourth Proportional to 525,110.40, 787,665.60 and 399,139.20

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Solution

The fourth proportional to 525,110.40, 787,665.60 and 399,139.20 is: 598,708.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,110.40 : 787,665.60 = 399,139.20 : x
  2. Step 2: Convert to fraction form
    525,110.40/787,665.60 = 399,139.20/x
  3. Step 3: Cross multiply
    525,110.40x = 787,665.60 × 399,139.20
  4. Step 4: Simplify right side
    525,110.40x = 314,388,217,451.52
  5. Step 5: Solve for x
    x = 314,388,217,451.52/525,110.40
  6. Step 6: Final answer
    x = 598,708.80

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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.