Home / 438,622.40-657,998.40-139,131.20

Finding the Fourth Proportional to 438,622.40, 657,998.40 and 139,131.20

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Solution

The fourth proportional to 438,622.40, 657,998.40 and 139,131.20 is: 208,717.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,622.40 : 657,998.40 = 139,131.20 : x
  2. Step 2: Convert to fraction form
    438,622.40/657,998.40 = 139,131.20/x
  3. Step 3: Cross multiply
    438,622.40x = 657,998.40 × 139,131.20
  4. Step 4: Simplify right side
    438,622.40x = 91,548,106,990.08
  5. Step 5: Solve for x
    x = 91,548,106,990.08/438,622.40
  6. Step 6: Final answer
    x = 208,717.35

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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.