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Finding the Fourth Proportional to 665,866.48, 996,311.40 and 385,515.76

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Solution

The fourth proportional to 665,866.48, 996,311.40 and 385,515.76 is: 576,832.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,866.48 : 996,311.40 = 385,515.76 : x
  2. Step 2: Convert to fraction form
    665,866.48/996,311.40 = 385,515.76/x
  3. Step 3: Cross multiply
    665,866.48x = 996,311.40 × 385,515.76
  4. Step 4: Simplify right side
    665,866.48x = 384,093,746,567.66
  5. Step 5: Solve for x
    x = 384,093,746,567.66/665,866.48
  6. Step 6: Final answer
    x = 576,832.98

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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.