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Finding the Fourth Proportional to 611,221.20, 916,831.80 and 556,108.80

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Solution

The fourth proportional to 611,221.20, 916,831.80 and 556,108.80 is: 834,163.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,221.20 : 916,831.80 = 556,108.80 : x
  2. Step 2: Convert to fraction form
    611,221.20/916,831.80 = 556,108.80/x
  3. Step 3: Cross multiply
    611,221.20x = 916,831.80 × 556,108.80
  4. Step 4: Simplify right side
    611,221.20x = 509,858,232,099.84
  5. Step 5: Solve for x
    x = 509,858,232,099.84/611,221.20
  6. Step 6: Final answer
    x = 834,163.20

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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.