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Finding the Fourth Proportional to 405,809.20, 608,713.80 and 403,476.40

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Solution

The fourth proportional to 405,809.20, 608,713.80 and 403,476.40 is: 605,214.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,809.20 : 608,713.80 = 403,476.40 : x
  2. Step 2: Convert to fraction form
    405,809.20/608,713.80 = 403,476.40/x
  3. Step 3: Cross multiply
    405,809.20x = 608,713.80 × 403,476.40
  4. Step 4: Simplify right side
    405,809.20x = 245,601,652,654.32
  5. Step 5: Solve for x
    x = 245,601,652,654.32/405,809.20
  6. Step 6: Final answer
    x = 605,214.60

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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.