Home / 808,908.40-1,214,140.20-409,999.60

Finding the Fourth Proportional to 808,908.40, 1,214,140.20 and 409,999.60

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Solution

The fourth proportional to 808,908.40, 1,214,140.20 and 409,999.60 is: 615,393.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,908.40 : 1,214,140.20 = 409,999.60 : x
  2. Step 2: Convert to fraction form
    808,908.40/1,214,140.20 = 409,999.60/x
  3. Step 3: Cross multiply
    808,908.40x = 1,214,140.20 × 409,999.60
  4. Step 4: Simplify right side
    808,908.40x = 497,796,996,343.92
  5. Step 5: Solve for x
    x = 497,796,996,343.92/808,908.40
  6. Step 6: Final answer
    x = 615,393.53

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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.