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Finding the Fourth Proportional to 438,657.84, 658,010.79 and 139,116.74

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Solution

The fourth proportional to 438,657.84, 658,010.79 and 139,116.74 is: 208,682.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,657.84 : 658,010.79 = 139,116.74 : x
  2. Step 2: Convert to fraction form
    438,657.84/658,010.79 = 139,116.74/x
  3. Step 3: Cross multiply
    438,657.84x = 658,010.79 × 139,116.74
  4. Step 4: Simplify right side
    438,657.84x = 91,540,312,699.57
  5. Step 5: Solve for x
    x = 91,540,312,699.57/438,657.84
  6. Step 6: Final answer
    x = 208,682.72

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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.