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Finding the Fourth Proportional to 608,046.40, 912,069.60 and 408,980.80

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Solution

The fourth proportional to 608,046.40, 912,069.60 and 408,980.80 is: 613,471.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,046.40 : 912,069.60 = 408,980.80 : x
  2. Step 2: Convert to fraction form
    608,046.40/912,069.60 = 408,980.80/x
  3. Step 3: Cross multiply
    608,046.40x = 912,069.60 × 408,980.80
  4. Step 4: Simplify right side
    608,046.40x = 373,018,954,663.68
  5. Step 5: Solve for x
    x = 373,018,954,663.68/608,046.40
  6. Step 6: Final answer
    x = 613,471.20

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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.