Home / 405,966.30-608,949.45-390,414.30

Finding the Fourth Proportional to 405,966.30, 608,949.45 and 390,414.30

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Solution

The fourth proportional to 405,966.30, 608,949.45 and 390,414.30 is: 585,621.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,966.30 : 608,949.45 = 390,414.30 : x
  2. Step 2: Convert to fraction form
    405,966.30/608,949.45 = 390,414.30/x
  3. Step 3: Cross multiply
    405,966.30x = 608,949.45 × 390,414.30
  4. Step 4: Simplify right side
    405,966.30x = 237,742,573,257.14
  5. Step 5: Solve for x
    x = 237,742,573,257.14/405,966.30
  6. Step 6: Final answer
    x = 585,621.45

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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.