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Finding the Fourth Proportional to 438,271.72, 657,506.10 and 138,770.20

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Solution

The fourth proportional to 438,271.72, 657,506.10 and 138,770.20 is: 208,186.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,271.72 : 657,506.10 = 138,770.20 : x
  2. Step 2: Convert to fraction form
    438,271.72/657,506.10 = 138,770.20/x
  3. Step 3: Cross multiply
    438,271.72x = 657,506.10 × 138,770.20
  4. Step 4: Simplify right side
    438,271.72x = 91,242,252,998.22
  5. Step 5: Solve for x
    x = 91,242,252,998.22/438,271.72
  6. Step 6: Final answer
    x = 208,186.49

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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.