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Finding the Fourth Proportional to 318,953.09, 478,430.30 and 299,466.89

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Solution

The fourth proportional to 318,953.09, 478,430.30 and 299,466.89 is: 449,200.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,953.09 : 478,430.30 = 299,466.89 : x
  2. Step 2: Convert to fraction form
    318,953.09/478,430.30 = 299,466.89/x
  3. Step 3: Cross multiply
    318,953.09x = 478,430.30 × 299,466.89
  4. Step 4: Simplify right side
    318,953.09x = 143,274,034,022.77
  5. Step 5: Solve for x
    x = 143,274,034,022.77/318,953.09
  6. Step 6: Final answer
    x = 449,200.96

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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.