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Finding the Fourth Proportional to 509,312.40, 764,784.60 and 404,998.80

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Solution

The fourth proportional to 509,312.40, 764,784.60 and 404,998.80 is: 608,147.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,312.40 : 764,784.60 = 404,998.80 : x
  2. Step 2: Convert to fraction form
    509,312.40/764,784.60 = 404,998.80/x
  3. Step 3: Cross multiply
    509,312.40x = 764,784.60 × 404,998.80
  4. Step 4: Simplify right side
    509,312.40x = 309,736,845,258.48
  5. Step 5: Solve for x
    x = 309,736,845,258.48/509,312.40
  6. Step 6: Final answer
    x = 608,147.07

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1.5x scale

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.