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Finding the Fourth Proportional to 438,622.01, 657,956.50 and 139,125.32

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Solution

The fourth proportional to 438,622.01, 657,956.50 and 139,125.32 is: 208,695.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,622.01 : 657,956.50 = 139,125.32 : x
  2. Step 2: Convert to fraction form
    438,622.01/657,956.50 = 139,125.32/x
  3. Step 3: Cross multiply
    438,622.01x = 657,956.50 × 139,125.32
  4. Step 4: Simplify right side
    438,622.01x = 91,538,405,318.80
  5. Step 5: Solve for x
    x = 91,538,405,318.80/438,622.01
  6. Step 6: Final answer
    x = 208,695.42

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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.