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Finding the Fourth Proportional to 608,147.20, 912,220.80 and 409,081.60

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Solution

The fourth proportional to 608,147.20, 912,220.80 and 409,081.60 is: 613,622.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,147.20 : 912,220.80 = 409,081.60 : x
  2. Step 2: Convert to fraction form
    608,147.20/912,220.80 = 409,081.60/x
  3. Step 3: Cross multiply
    608,147.20x = 912,220.80 × 409,081.60
  4. Step 4: Simplify right side
    608,147.20x = 373,172,744,417.28
  5. Step 5: Solve for x
    x = 373,172,744,417.28/608,147.20
  6. Step 6: Final answer
    x = 613,622.40

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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.