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Finding the Fourth Proportional to 608,112.80, 912,169.20 and 409,047.20

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Solution

The fourth proportional to 608,112.80, 912,169.20 and 409,047.20 is: 613,570.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,112.80 : 912,169.20 = 409,047.20 : x
  2. Step 2: Convert to fraction form
    608,112.80/912,169.20 = 409,047.20/x
  3. Step 3: Cross multiply
    608,112.80x = 912,169.20 × 409,047.20
  4. Step 4: Simplify right side
    608,112.80x = 373,120,257,186.24
  5. Step 5: Solve for x
    x = 373,120,257,186.24/608,112.80
  6. Step 6: Final answer
    x = 613,570.80

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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.