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Finding the Fourth Proportional to 611,168.40, 917,443.80 and 361,990.80

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Solution

The fourth proportional to 611,168.40, 917,443.80 and 361,990.80 is: 543,395.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,168.40 : 917,443.80 = 361,990.80 : x
  2. Step 2: Convert to fraction form
    611,168.40/917,443.80 = 361,990.80/x
  3. Step 3: Cross multiply
    611,168.40x = 917,443.80 × 361,990.80
  4. Step 4: Simplify right side
    611,168.40x = 332,106,215,117.04
  5. Step 5: Solve for x
    x = 332,106,215,117.04/611,168.40
  6. Step 6: Final answer
    x = 543,395.59

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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.