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Finding the Fourth Proportional to 528,831.40, 792,080.70 and 318,101.80

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Solution

The fourth proportional to 528,831.40, 792,080.70 and 318,101.80 is: 476,451.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,831.40 : 792,080.70 = 318,101.80 : x
  2. Step 2: Convert to fraction form
    528,831.40/792,080.70 = 318,101.80/x
  3. Step 3: Cross multiply
    528,831.40x = 792,080.70 × 318,101.80
  4. Step 4: Simplify right side
    528,831.40x = 251,962,296,415.26
  5. Step 5: Solve for x
    x = 251,962,296,415.26/528,831.40
  6. Step 6: Final answer
    x = 476,451.09

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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.