Home / 808,469.20-1,212,703.80-509,287.60

Finding the Fourth Proportional to 808,469.20, 1,212,703.80 and 509,287.60

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Solution

The fourth proportional to 808,469.20, 1,212,703.80 and 509,287.60 is: 763,931.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,469.20 : 1,212,703.80 = 509,287.60 : x
  2. Step 2: Convert to fraction form
    808,469.20/1,212,703.80 = 509,287.60/x
  3. Step 3: Cross multiply
    808,469.20x = 1,212,703.80 × 509,287.60
  4. Step 4: Simplify right side
    808,469.20x = 617,615,007,812.88
  5. Step 5: Solve for x
    x = 617,615,007,812.88/808,469.20
  6. Step 6: Final answer
    x = 763,931.40

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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.