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Finding the Fourth Proportional to 522,820.40, 783,193.80 and 311,831.60

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Solution

The fourth proportional to 522,820.40, 783,193.80 and 311,831.60 is: 467,129.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,820.40 : 783,193.80 = 311,831.60 : x
  2. Step 2: Convert to fraction form
    522,820.40/783,193.80 = 311,831.60/x
  3. Step 3: Cross multiply
    522,820.40x = 783,193.80 × 311,831.60
  4. Step 4: Simplify right side
    522,820.40x = 244,224,575,764.08
  5. Step 5: Solve for x
    x = 244,224,575,764.08/522,820.40
  6. Step 6: Final answer
    x = 467,129.01

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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.