Home / 808,612.20-1,212,918.30-509,430.60

Finding the Fourth Proportional to 808,612.20, 1,212,918.30 and 509,430.60

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Solution

The fourth proportional to 808,612.20, 1,212,918.30 and 509,430.60 is: 764,145.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,612.20 : 1,212,918.30 = 509,430.60 : x
  2. Step 2: Convert to fraction form
    808,612.20/1,212,918.30 = 509,430.60/x
  3. Step 3: Cross multiply
    808,612.20x = 1,212,918.30 × 509,430.60
  4. Step 4: Simplify right side
    808,612.20x = 617,897,697,319.98
  5. Step 5: Solve for x
    x = 617,897,697,319.98/808,612.20
  6. Step 6: Final answer
    x = 764,145.90

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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.