Home / 864,000.20-1,296,000.30-612,057.80

Finding the Fourth Proportional to 864,000.20, 1,296,000.30 and 612,057.80

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Solution

The fourth proportional to 864,000.20, 1,296,000.30 and 612,057.80 is: 918,086.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    864,000.20 : 1,296,000.30 = 612,057.80 : x
  2. Step 2: Convert to fraction form
    864,000.20/1,296,000.30 = 612,057.80/x
  3. Step 3: Cross multiply
    864,000.20x = 1,296,000.30 × 612,057.80
  4. Step 4: Simplify right side
    864,000.20x = 793,227,092,417.34
  5. Step 5: Solve for x
    x = 793,227,092,417.34/864,000.20
  6. Step 6: Final answer
    x = 918,086.70

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Double scale
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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.