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Finding the Fourth Proportional to 318,950.80, 478,426.20 and 303,398.80

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Solution

The fourth proportional to 318,950.80, 478,426.20 and 303,398.80 is: 455,098.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,950.80 : 478,426.20 = 303,398.80 : x
  2. Step 2: Convert to fraction form
    318,950.80/478,426.20 = 303,398.80/x
  3. Step 3: Cross multiply
    318,950.80x = 478,426.20 × 303,398.80
  4. Step 4: Simplify right side
    318,950.80x = 145,153,934,968.56
  5. Step 5: Solve for x
    x = 145,153,934,968.56/318,950.80
  6. Step 6: Final answer
    x = 455,098.20

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1.5x scale

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.