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Finding the Fourth Proportional to 438,831.95, 658,270.71 and 139,335.98

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Solution

The fourth proportional to 438,831.95, 658,270.71 and 139,335.98 is: 209,011.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,831.95 : 658,270.71 = 139,335.98 : x
  2. Step 2: Convert to fraction form
    438,831.95/658,270.71 = 139,335.98/x
  3. Step 3: Cross multiply
    438,831.95x = 658,270.71 × 139,335.98
  4. Step 4: Simplify right side
    438,831.95x = 91,720,791,191.79
  5. Step 5: Solve for x
    x = 91,720,791,191.79/438,831.95
  6. Step 6: Final answer
    x = 209,011.20

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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.