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Finding the Fourth Proportional to 603,722.60, 904,547.10 and 318,991.40

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Solution

The fourth proportional to 603,722.60, 904,547.10 and 318,991.40 is: 477,939.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,722.60 : 904,547.10 = 318,991.40 : x
  2. Step 2: Convert to fraction form
    603,722.60/904,547.10 = 318,991.40/x
  3. Step 3: Cross multiply
    603,722.60x = 904,547.10 × 318,991.40
  4. Step 4: Simplify right side
    603,722.60x = 288,542,745,794.94
  5. Step 5: Solve for x
    x = 288,542,745,794.94/603,722.60
  6. Step 6: Final answer
    x = 477,939.28

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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.