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Finding the Fourth Proportional to 612,005.80, 918,138.30 and 185,506.60

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Solution

The fourth proportional to 612,005.80, 918,138.30 and 185,506.60 is: 278,299.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,005.80 : 918,138.30 = 185,506.60 : x
  2. Step 2: Convert to fraction form
    612,005.80/918,138.30 = 185,506.60/x
  3. Step 3: Cross multiply
    612,005.80x = 918,138.30 × 185,506.60
  4. Step 4: Simplify right side
    612,005.80x = 170,320,714,362.78
  5. Step 5: Solve for x
    x = 170,320,714,362.78/612,005.80
  6. Step 6: Final answer
    x = 278,299.18

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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.