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Finding the Fourth Proportional to 328,262.10, 492,047.55 and 128,505.30

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Solution

The fourth proportional to 328,262.10, 492,047.55 and 128,505.30 is: 192,622.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,262.10 : 492,047.55 = 128,505.30 : x
  2. Step 2: Convert to fraction form
    328,262.10/492,047.55 = 128,505.30/x
  3. Step 3: Cross multiply
    328,262.10x = 492,047.55 × 128,505.30
  4. Step 4: Simplify right side
    328,262.10x = 63,230,718,027.02
  5. Step 5: Solve for x
    x = 63,230,718,027.02/328,262.10
  6. Step 6: Final answer
    x = 192,622.66

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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.