Home / 438,467.28-657,719.40-138,941.28

Finding the Fourth Proportional to 438,467.28, 657,719.40 and 138,941.28

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Solution

The fourth proportional to 438,467.28, 657,719.40 and 138,941.28 is: 208,417.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,467.28 : 657,719.40 = 138,941.28 : x
  2. Step 2: Convert to fraction form
    438,467.28/657,719.40 = 138,941.28/x
  3. Step 3: Cross multiply
    438,467.28x = 657,719.40 × 138,941.28
  4. Step 4: Simplify right side
    438,467.28x = 91,384,375,316.83
  5. Step 5: Solve for x
    x = 91,384,375,316.83/438,467.28
  6. Step 6: Final answer
    x = 208,417.78

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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.