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Finding the Fourth Proportional to 550,831.19, 760,180.55 and 309,129.21

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Solution

The fourth proportional to 550,831.19, 760,180.55 and 309,129.21 is: 426,617.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,831.19 : 760,180.55 = 309,129.21 : x
  2. Step 2: Convert to fraction form
    550,831.19/760,180.55 = 309,129.21/x
  3. Step 3: Cross multiply
    550,831.19x = 760,180.55 × 309,129.21
  4. Step 4: Simplify right side
    550,831.19x = 234,994,011,333.22
  5. Step 5: Solve for x
    x = 234,994,011,333.22/550,831.19
  6. Step 6: Final answer
    x = 426,617.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.