Home / 818,000.30-1,227,000.45-319,364.30

Finding the Fourth Proportional to 818,000.30, 1,227,000.45 and 319,364.30

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Solution

The fourth proportional to 818,000.30, 1,227,000.45 and 319,364.30 is: 479,046.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,000.30 : 1,227,000.45 = 319,364.30 : x
  2. Step 2: Convert to fraction form
    818,000.30/1,227,000.45 = 319,364.30/x
  3. Step 3: Cross multiply
    818,000.30x = 1,227,000.45 × 319,364.30
  4. Step 4: Simplify right side
    818,000.30x = 391,860,139,813.94
  5. Step 5: Solve for x
    x = 391,860,139,813.94/818,000.30
  6. Step 6: Final answer
    x = 479,046.45

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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.