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Finding the Fourth Proportional to 612,006.80, 916,195.80 and 454,931.60

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Solution

The fourth proportional to 612,006.80, 916,195.80 and 454,931.60 is: 681,048.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,006.80 : 916,195.80 = 454,931.60 : x
  2. Step 2: Convert to fraction form
    612,006.80/916,195.80 = 454,931.60/x
  3. Step 3: Cross multiply
    612,006.80x = 916,195.80 × 454,931.60
  4. Step 4: Simplify right side
    612,006.80x = 416,806,421,207.28
  5. Step 5: Solve for x
    x = 416,806,421,207.28/612,006.80
  6. Step 6: Final answer
    x = 681,048.68

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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.