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Finding the Fourth Proportional to 608,943.90, 913,415.85 and 409,878.30

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Solution

The fourth proportional to 608,943.90, 913,415.85 and 409,878.30 is: 614,817.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,943.90 : 913,415.85 = 409,878.30 : x
  2. Step 2: Convert to fraction form
    608,943.90/913,415.85 = 409,878.30/x
  3. Step 3: Cross multiply
    608,943.90x = 913,415.85 × 409,878.30
  4. Step 4: Simplify right side
    608,943.90x = 374,389,335,791.06
  5. Step 5: Solve for x
    x = 374,389,335,791.06/608,943.90
  6. Step 6: Final answer
    x = 614,817.45

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Double scale
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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.