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Finding the Fourth Proportional to 603,120.30, 903,643.65 and 392,649.90

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Solution

The fourth proportional to 603,120.30, 903,643.65 and 392,649.90 is: 588,299.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,120.30 : 903,643.65 = 392,649.90 : x
  2. Step 2: Convert to fraction form
    603,120.30/903,643.65 = 392,649.90/x
  3. Step 3: Cross multiply
    603,120.30x = 903,643.65 × 392,649.90
  4. Step 4: Simplify right side
    603,120.30x = 354,815,588,808.14
  5. Step 5: Solve for x
    x = 354,815,588,808.14/603,120.30
  6. Step 6: Final answer
    x = 588,299.86

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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.