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Finding the Fourth Proportional to 438,881.72, 658,255.35 and 139,323.20

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Solution

The fourth proportional to 438,881.72, 658,255.35 and 139,323.20 is: 208,963.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,881.72 : 658,255.35 = 139,323.20 : x
  2. Step 2: Convert to fraction form
    438,881.72/658,255.35 = 139,323.20/x
  3. Step 3: Cross multiply
    438,881.72x = 658,255.35 × 139,323.20
  4. Step 4: Simplify right side
    438,881.72x = 91,710,241,779.12
  5. Step 5: Solve for x
    x = 91,710,241,779.12/438,881.72
  6. Step 6: Final answer
    x = 208,963.46

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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.