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Finding the Fourth Proportional to 438,888.89, 658,266.06 and 139,330.64

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Solution

The fourth proportional to 438,888.89, 658,266.06 and 139,330.64 is: 208,974.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,888.89 : 658,266.06 = 139,330.64 : x
  2. Step 2: Convert to fraction form
    438,888.89/658,266.06 = 139,330.64/x
  3. Step 3: Cross multiply
    438,888.89x = 658,266.06 × 139,330.64
  4. Step 4: Simplify right side
    438,888.89x = 91,716,631,430.08
  5. Step 5: Solve for x
    x = 91,716,631,430.08/438,888.89
  6. Step 6: Final answer
    x = 208,974.60

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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.