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Finding the Fourth Proportional to 329,493.28, 490,001.12 and 318,995.68

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Solution

The fourth proportional to 329,493.28, 490,001.12 and 318,995.68 is: 474,389.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,493.28 : 490,001.12 = 318,995.68 : x
  2. Step 2: Convert to fraction form
    329,493.28/490,001.12 = 318,995.68/x
  3. Step 3: Cross multiply
    329,493.28x = 490,001.12 × 318,995.68
  4. Step 4: Simplify right side
    329,493.28x = 156,308,240,475.16
  5. Step 5: Solve for x
    x = 156,308,240,475.16/329,493.28
  6. Step 6: Final answer
    x = 474,389.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.