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Finding the Fourth Proportional to 612,095.80, 918,143.70 and 275,006.20

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Solution

The fourth proportional to 612,095.80, 918,143.70 and 275,006.20 is: 412,509.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,095.80 : 918,143.70 = 275,006.20 : x
  2. Step 2: Convert to fraction form
    612,095.80/918,143.70 = 275,006.20/x
  3. Step 3: Cross multiply
    612,095.80x = 918,143.70 × 275,006.20
  4. Step 4: Simplify right side
    612,095.80x = 252,495,209,990.94
  5. Step 5: Solve for x
    x = 252,495,209,990.94/612,095.80
  6. Step 6: Final answer
    x = 412,509.30

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Similar ratio
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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.