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Finding the Fourth Proportional to 604,405.80, 905,515.20 and 288,165.60

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Solution

The fourth proportional to 604,405.80, 905,515.20 and 288,165.60 is: 431,727.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,405.80 : 905,515.20 = 288,165.60 : x
  2. Step 2: Convert to fraction form
    604,405.80/905,515.20 = 288,165.60/x
  3. Step 3: Cross multiply
    604,405.80x = 905,515.20 × 288,165.60
  4. Step 4: Simplify right side
    604,405.80x = 260,938,330,917.12
  5. Step 5: Solve for x
    x = 260,938,330,917.12/604,405.80
  6. Step 6: Final answer
    x = 431,727.05

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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.