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Finding the Fourth Proportional to 578,220.44, 866,831.72 and 278,288.40

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Solution

The fourth proportional to 578,220.44, 866,831.72 and 278,288.40 is: 417,192.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,220.44 : 866,831.72 = 278,288.40 : x
  2. Step 2: Convert to fraction form
    578,220.44/866,831.72 = 278,288.40/x
  3. Step 3: Cross multiply
    578,220.44x = 866,831.72 × 278,288.40
  4. Step 4: Simplify right side
    578,220.44x = 241,229,212,428.05
  5. Step 5: Solve for x
    x = 241,229,212,428.05/578,220.44
  6. Step 6: Final answer
    x = 417,192.47

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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.