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Finding the Fourth Proportional to 404,742.80, 607,114.20 and 393,078.80

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Solution

The fourth proportional to 404,742.80, 607,114.20 and 393,078.80 is: 589,618.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,742.80 : 607,114.20 = 393,078.80 : x
  2. Step 2: Convert to fraction form
    404,742.80/607,114.20 = 393,078.80/x
  3. Step 3: Cross multiply
    404,742.80x = 607,114.20 × 393,078.80
  4. Step 4: Simplify right side
    404,742.80x = 238,643,721,198.96
  5. Step 5: Solve for x
    x = 238,643,721,198.96/404,742.80
  6. Step 6: Final answer
    x = 589,618.20

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Similar ratio
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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.