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Finding the Fourth Proportional to 815,388.12, 1,222,776 and 282,780.72

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Solution

The fourth proportional to 815,388.12, 1,222,776 and 282,780.72 is: 424,064.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,388.12 : 1,222,776 = 282,780.72 : x
  2. Step 2: Convert to fraction form
    815,388.12/1,222,776 = 282,780.72/x
  3. Step 3: Cross multiply
    815,388.12x = 1,222,776 × 282,780.72
  4. Step 4: Simplify right side
    815,388.12x = 345,777,477,678.72
  5. Step 5: Solve for x
    x = 345,777,477,678.72/815,388.12
  6. Step 6: Final answer
    x = 424,064.90

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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.