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Finding the Fourth Proportional to 328,555.75, 492,833.64 and 128,970.13

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Solution

The fourth proportional to 328,555.75, 492,833.64 and 128,970.13 is: 193,455.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,555.75 : 492,833.64 = 128,970.13 : x
  2. Step 2: Convert to fraction form
    328,555.75/492,833.64 = 128,970.13/x
  3. Step 3: Cross multiply
    328,555.75x = 492,833.64 × 128,970.13
  4. Step 4: Simplify right side
    328,555.75x = 63,560,818,619.17
  5. Step 5: Solve for x
    x = 63,560,818,619.17/328,555.75
  6. Step 6: Final answer
    x = 193,455.20

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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.