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Finding the Fourth Proportional to 404,010.40, 606,015.60 and 385,639.60

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Solution

The fourth proportional to 404,010.40, 606,015.60 and 385,639.60 is: 578,459.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,010.40 : 606,015.60 = 385,639.60 : x
  2. Step 2: Convert to fraction form
    404,010.40/606,015.60 = 385,639.60/x
  3. Step 3: Cross multiply
    404,010.40x = 606,015.60 × 385,639.60
  4. Step 4: Simplify right side
    404,010.40x = 233,703,613,577.76
  5. Step 5: Solve for x
    x = 233,703,613,577.76/404,010.40
  6. Step 6: Final answer
    x = 578,459.40

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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.