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Finding the Fourth Proportional to 438,657.54, 658,009.70 and 139,162.07

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Solution

The fourth proportional to 438,657.54, 658,009.70 and 139,162.07 is: 208,750.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,657.54 : 658,009.70 = 139,162.07 : x
  2. Step 2: Convert to fraction form
    438,657.54/658,009.70 = 139,162.07/x
  3. Step 3: Cross multiply
    438,657.54x = 658,009.70 × 139,162.07
  4. Step 4: Simplify right side
    438,657.54x = 91,569,987,946.22
  5. Step 5: Solve for x
    x = 91,569,987,946.22/438,657.54
  6. Step 6: Final answer
    x = 208,750.52

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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.