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Finding the Fourth Proportional to 328,038.80, 490,260.69 and 239,478.80

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Solution

The fourth proportional to 328,038.80, 490,260.69 and 239,478.80 is: 357,905.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,038.80 : 490,260.69 = 239,478.80 : x
  2. Step 2: Convert to fraction form
    328,038.80/490,260.69 = 239,478.80/x
  3. Step 3: Cross multiply
    328,038.80x = 490,260.69 × 239,478.80
  4. Step 4: Simplify right side
    328,038.80x = 117,407,041,728.37
  5. Step 5: Solve for x
    x = 117,407,041,728.37/328,038.80
  6. Step 6: Final answer
    x = 357,905.96

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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.