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Finding the Fourth Proportional to 644,437.20, 965,999.70 and 378,060.60

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Solution

The fourth proportional to 644,437.20, 965,999.70 and 378,060.60 is: 566,706.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,437.20 : 965,999.70 = 378,060.60 : x
  2. Step 2: Convert to fraction form
    644,437.20/965,999.70 = 378,060.60/x
  3. Step 3: Cross multiply
    644,437.20x = 965,999.70 × 378,060.60
  4. Step 4: Simplify right side
    644,437.20x = 365,206,426,181.82
  5. Step 5: Solve for x
    x = 365,206,426,181.82/644,437.20
  6. Step 6: Final answer
    x = 566,706.00

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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.