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Finding the Fourth Proportional to 603,506.40, 905,950.80 and 354,328.80

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Solution

The fourth proportional to 603,506.40, 905,950.80 and 354,328.80 is: 531,899.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,506.40 : 905,950.80 = 354,328.80 : x
  2. Step 2: Convert to fraction form
    603,506.40/905,950.80 = 354,328.80/x
  3. Step 3: Cross multiply
    603,506.40x = 905,950.80 × 354,328.80
  4. Step 4: Simplify right side
    603,506.40x = 321,004,459,823.04
  5. Step 5: Solve for x
    x = 321,004,459,823.04/603,506.40
  6. Step 6: Final answer
    x = 531,899.02

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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.